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Questions by Arjun
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answers
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votes
GATE2018-1-26
Let $X_1, \: X_2$ be two independent normal random variables with means $\mu_1, \: \ \mu_2$ and standard deviations $\sigma_1, \: \sigma_2$, respectively. Consider $Y=X_1-X_2; \: \mu_1 = \mu_2 =1, \: \sigma_1=1, \: \sigma_2=2$. Then, $Y$ is normally ... $0$ and variance $5$, but is NOT normally distributed $Y$ has mean $0$ and variance $1$, but is NOT normally distributed
Let $X_1, \: X_2$ be two independent normal random variables with means $\mu_1, \: \ \mu_2$ and standard deviations $\sigma_1, \: \sigma_2$, respectively. Consider $Y=X_1...
asked
Feb 17, 2018
Probability and Statistics
gateme-2018-set1
probability-and-statistics
probability
random-variables
mode-and-standard-deviation
+
–
0
answers
0
votes
GATE2018-1-27
The value of the integral over the closed surface $S$ bounding a volume $V$, where $\overrightarrow{r} = x \hat{i} + y \hat{j}+z \hat{k}$ is the position vector and $\overrightarrow{n}$ is the normal to the surface $S$, is $V$ $2V$ $3V$ $4V$
The value of the integralover the closed surface $S$ bounding a volume $V$, where $\overrightarrow{r} = x \hat{i} + y \hat{j}+z \hat{k}$ is the position vector and $\over...
asked
Feb 17, 2018
Calculus
gateme-2018-set1
calculus
surface-integral
vector-identities
+
–
0
answers
0
votes
GATE2018-1-28
A point mass is shot vertically up from ground level with a velocity of $4$ m/s at time, $t=0$. It loses $20 \%$ of its impact velocity after each collision with the ground. Assuming that the acceleration due to gravity is $10 \: m/s^2$ and that air resistance ... , the mass stops bouncing and comes to complete rest on the ground after a total time (in seconds) of $1$ $2$ $4$ $\infty$
A point mass is shot vertically up from ground level with a velocity of $4$ m/s at time, $t=0$. It loses $20 \%$ of its impact velocity after each collision with the grou...
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
applied-mechanics-and-design
engineering-mechanics
+
–
0
answers
0
votes
GATE2018-1-29
The state of stress at a point, for a body in plane stress, is shown in the figure below. If the minimum principal stress is $10$ kPa, then the normal stress $\sigma_y$ (in kPa) is $9.45$ $18.88$ $37.78$ $75.50$
The state of stress at a point, for a body in plane stress, is shown in the figure below. If the minimum principal stress is $10$ kPa, then the normal stress $\sigma_y$ (...
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
applied-mechanics-and-design
mechanics-of-materials
stress-strain
+
–
0
answers
0
votes
GATE2018-1-30
An epicyclic gear train is shown in the figure below. The number of teeth on the gears A, B and D are $20$, $30$ and $20$, respectively. Gear C has $80$ teeth on the inner surface and $100$ teeth on the outer surface. If the carrier arm AB is fixed and the ... A rotates at $300$ rpm in the clockwise direction, then the rpm of D in the clockwise direction is $240$ $-240$ $375$ $-375$
An epicyclic gear train is shown in the figure below. The number of teeth on the gears A, B and D are $20$, $30$ and $20$, respectively. Gear C has $80$ teeth on the inne...
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
applied-mechanics-and-design
theory-of-machines
gears-and-gear-trains
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–
0
answers
0
votes
GATE2018-1-31
A carpenter glues a pair of cylindrical wooden logs by bonding their end faces at an angle of $\theta = 30^{\circ}$ as shown in the figure. The glue used at the interface fails is Criterion 1: the maximum normal stress exceeds $2.5$ MPa Criterion 2: the ... fails only because of criterion $1$ fails only because of criterion $2$ fails because of both criterion $1$ and $2$ does not fail
A carpenter glues a pair of cylindrical wooden logs by bonding their end faces at an angle of $\theta = 30^{\circ}$ as shown in the figure.The glue used at the interface ...
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
applied-mechanics-and-design
mechanics-of-materials
stress-strain
+
–
0
answers
0
votes
GATE2018-1-23
An ideal gas undergoes a process from state $1 \: (T_1 = 300\: K, \: p_1 = 100 \: kPa)$ to state $2 \: (T_2 = 600 \; K, \: p_2 = 500 \: kPa)$. The specific heats of the ideal gas are: $C_p = 1 \: kJ/kg-K$ and $C_v = 0.7 \: kJ/kg-K$. The change in specific entropy of the ideal gas from state $1$ to state $2$ (in $kJ/kg-K$) is ______ (correct to two decimal places).
An ideal gas undergoes a process from state $1 \: (T_1 = 300\: K, \: p_1 = 100 \: kPa)$ to state $2 \: (T_2 = 600 \; K, \: p_2 = 500 \: kPa)$. The specific heats of the...
asked
Feb 17, 2018
Applications
gateme-2018-set1
numerical-answers
fluid-mechanics-and-thermal-science
applications
vapour-and-gas-power-cycles
+
–
0
answers
0
votes
GATE2018-1-24
For a Pelton wheel with a given water jet velocity, the maximum output power from the Pelton wheel is obtained when the ratio of the bucket speed to the water jet speed is _____ (correct to two decimal places)
For a Pelton wheel with a given water jet velocity, the maximum output power from the Pelton wheel is obtained when the ratio of the bucket speed to the water jet speed i...
asked
Feb 17, 2018
Applications
gateme-2018-set1
numerical-answers
fluid-mechanics-and-thermal-science
applications
pelton-wheel
+
–
1
answers
0
votes
GATE2018-1-22
A flat plate of width $L=1 \: m$ is pushed down with a velocity $U=0.01 \: m/s$ towards a wall resulting in the drainage of the fluid between the plate and the wall as sown in the figure. Assume two-dimensional incompressible flow and that the plate remains ... $m/s$) draining out at the instant shown in the figure is ____ (correct to three decimal places).
A flat plate of width $L=1 \: m$ is pushed down with a velocity $U=0.01 \: m/s$ towards a wall resulting in the drainage of the fluid between the plate and the wall as so...
asked
Feb 17, 2018
Fluid Mechanics
gateme-2018-set1
numerical-answers
fluid-mechanics-and-thermal-science
fluid-mechanics
+
–
0
answers
0
votes
GATE2018-1-21
If the wire diameter of a compressive helical spring is increased by $2 \%$, the change in spring stiffness (in $\%$) is _____ (correct to two decimal places)
If the wire diameter of a compressive helical spring is increased by $2 \%$, the change in spring stiffness (in $\%$) is _____ (correct to two decimal places)
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
numerical-answers
applied-mechanics-and-design
machine-design
springs
+
–
0
answers
0
votes
GATE2018-1-20
A four bar mechanism is made up of links of length $100$, $200$, $300$ and $350$ mm. If the $350$ mm link is fixed, the number of links that can rotate fully is _________
A four bar mechanism is made up of links of length $100$, $200$, $300$ and $350$ mm. If the $350$ mm link is fixed, the number of links that can rotate fully is _________...
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
numerical-answers
applied-mechanics-and-design
theory-of-machines
dynamic-analysis-of-linkages
+
–
0
answers
0
votes
GATE2018-1-19
A steel column of rectangular section ($15$ mm $\times \: 10$ mm) and length $1.5$ m is simply supported at both ends. Assuming modulus of elasticity, $E=200$ GPa for steel, the critical axial load (in kN) is ______ (correct to two decimal places).
A steel column of rectangular section ($15$ mm $\times \: 10$ mm) and length $1.5$ m is simply supported at both ends. Assuming modulus of elasticity, $E=200$ GPa for ste...
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
numerical-answers
applied-mechanics-and-design
mechanics-of-materials
deflection-of-beams
+
–
0
answers
0
votes
GATE2018-1-18
A six-faced fair dice is rolled five times. The probability (in $\%$) of obtaining "ONE" at least four times is $33.3$ $3.33$ $0.33$ $0.0033$
A six-faced fair dice is rolled five times. The probability (in $\%$) of obtaining "ONE" at least four times is$33.3$$3.33$$0.33$$0.0033$
asked
Feb 17, 2018
Probability and Statistics
gateme-2018-set1
probability-and-statistics
probability
+
–
1
answers
0
votes
GATE2018-1-17
The number of atoms per unit cell and the number of slip systems, respectively, for a face-centered cubic (FCC) crystal are $3, 3$ $3, 12$ $4, 12$ $4, 48$
The number of atoms per unit cell and the number of slip systems, respectively, for a face-centered cubic (FCC) crystal are$3, 3$$3, 12$$4, 12$$4, 48$
asked
Feb 17, 2018
Engineering Mechanics
gateme-2018-set1
engineering-mechanics
+
–
0
answers
0
votes
GATE2018-1-16
The time series forecasting method that gives equal weightage to each of the $m$ most recent observations is Moving average method Exponential smoothing with linear trend Triple Exponential smoothing Kalman Filter
The time series forecasting method that gives equal weightage to each of the $m$ most recent observations isMoving average methodExponential smoothing with linear trendTr...
asked
Feb 17, 2018
Production, Planning and Control
gateme-2018-set1
forecasting-models
production-planning-and-control
materials-manufacturing-and-industrial-engineering
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–
0
answers
0
votes
GATE2018-1-15
Interpolator in a CNC machine controls spindle speed coordinates axes movements operates tool changer commands canned cycle
Interpolator in a CNC machinecontrols spindle speedcoordinates axes movementsoperates tool changercommands canned cycle
asked
Feb 17, 2018
Materials, Manufacturing and Industrial Engineering
gateme-2018-set1
materials-manufacturing-and-industrial-engineering
+
–
0
answers
0
votes
GATE2018-1-14
A grinding ratio of $200$ implies that the grinding wheel wears $200$ times the volume of the material removed grinding wheel wears $0.005$ times the volume of the material removed aspect ratio of abrasive particles used in the grinding wheel is $200$ ratio of volume of abrasive particle to that of grinding wheel is $200$
A grinding ratio of $200$ implies that thegrinding wheel wears $200$ times the volume of the material removedgrinding wheel wears $0.005$ times the volume of the material...
asked
Feb 17, 2018
Materials, Manufacturing and Industrial Engineering
gateme-2018-set1
materials-manufacturing-and-industrial-engineering
machining-and-machine-tools-operations
+
–
0
answers
0
votes
GATE2018-1-13
Using the Taylor's tool life equation with exponent $n=0.5$, if th cutting speed is reduced by $50$, the ratio of new tool life to original tool life is $4$ $2$ $1$ $0.5$
Using the Taylor's tool life equation with exponent $n=0.5$, if th cutting speed is reduced by $50$, the ratio of new tool life to original tool life is$4$$2$$1$$0.5$
asked
Feb 17, 2018
Materials, Manufacturing and Industrial Engineering
gateme-2018-set1
materials-manufacturing-and-industrial-engineering
machining-and-machine-tools-operations
tool-life-and-wear
+
–
0
answers
0
votes
GATE2018-1-12
The type of weld represented by the shaded region in the figure is groove spot fillet plug
The type of weld represented by the shaded region in the figure isgroovespotfilletplug
asked
Feb 17, 2018
Materials, Manufacturing and Industrial Engineering
gateme-2018-set1
materials-manufacturing-and-industrial-engineering
casting-forming-and-joining-process
principles-of-welding
+
–
0
answers
1
votes
GATE2018-1-11
In a linearly hardening plastic material, the true stress beyond initial yielding increases linearly with the true strain decreases linearly with the true strain first increases linearly and then decreases linearly with the true strain remains constant
In a linearly hardening plastic material, the true stress beyond initial yieldingincreases linearly with the true straindecreases linearly with the true strainfirst incre...
asked
Feb 17, 2018
Mechanics of Materials
gateme-2018-set1
mechanics-of-materials
applied-mechanics-and-design
+
–
0
answers
0
votes
GATE2018-1-10
Which one of the following statements is correct for a superheated vapour? Its pressure is less than the saturation pressure at a given temperature Its temperature is less than the saturation temperature at a given pressure Its volume is less than the ... the saturated vapour at a given temperature Its enthalpy is less than the enthalpy of the saturated vapour at a given pressure
Which one of the following statements is correct for a superheated vapour?Its pressure is less than the saturation pressure at a given temperatureIts temperature is less ...
asked
Feb 17, 2018
Heat Transfer
gateme-2018-set1
heat-transfer
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2018-1-9
For a wo-dimensional incompressible flow field given by $\overrightarrow{u} = A(x \hat{i} - y \hat{j}), \text{ where } A>0$, which one of the following statements is FALSE? It satisfies continuity equation It is unidirectional when $x \rightarrow 0$ and $y \rightarrow \infty$ Its streamlines are given by $x=y$ It is irrotational
For a wo-dimensional incompressible flow field given by $\overrightarrow{u} = A(x \hat{i} - y \hat{j}), \text{ where } A>0$, which one of the following statements is FALS...
asked
Feb 17, 2018
Fluid Mechanics
gateme-2018-set1
fluid-mechanics
fluid-mechanics-and-thermal-science
+
–
0
answers
0
votes
GATE2018-1-8
For an Oldham coupling used between two shafts, which among the following statements are correct? Torsional load is transferred along shaft axis A velocity ratio of $1:2$ between shafts is obtained without using gears Bending load id transferred transverse to shaft axis Rotation is transferred along shaft axis I and III I and IV II and III II and IV
For an Oldham coupling used between two shafts, which among the following statements are correct?Torsional load is transferred along shaft axisA velocity ratio of $1:2$ b...
asked
Feb 17, 2018
Machine Design
gateme-2018-set1
machine-design
applied-mechanics-and-design
+
–
0
answers
0
votes
GATE2018-1-7
The equation of motion for a spring-mass system excited by a harmonic force is $M\ddot{x} + K x = F \cos(\omega t)$, where $M$ is the mass, $K$ is the spring stiffness, $F$ is the force amplitude and $\omega$ is the angular frequency of excitation. Resonance occurs when $\omega$ is equal ... $2 \pi \sqrt{\dfrac{K}{M}} \\$ $\sqrt{\dfrac{K}{M}}$
The equation of motion for a spring-mass system excited by a harmonic force is $M\ddot{x} + K x = F \cos(\omega t)$, where $M$ is the mass, $K$ is the spring stiffness, $...
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
applied-mechanics-and-design
machine-design
springs
+
–
0
answers
0
votes
GATE2018-1-6
If $\sigma_1$ and $\sigma_3$ are the algebraically largest and smallest principal stresses respectively, the value of the maximum shear stress is $\dfrac{\sigma_1 +\sigma_3}{2} \\$ $\dfrac{\sigma_1 -\sigma_3}{2} \\ $ $\sqrt{\dfrac{\sigma_1 +\sigma_3}{2}} \\$ $\sqrt{\dfrac{\sigma_1 -\sigma_3}{2}}$
If $\sigma_1$ and $\sigma_3$ are the algebraically largest and smallest principal stresses respectively, the value of the maximum shear stress is$\dfrac{\sigma_1 +\sigma_...
asked
Feb 17, 2018
Applied Mechanics and Design
gateme-2018-set1
applied-mechanics-and-design
mechanics-of-materials
stress-strain
+
–
0
answers
0
votes
GATE2018-1-5
A bar of uniform cross section and weighing $100 \:N$ is held horizontally using two massless and inextensible strings $S1$ and $S2$ as shown in the figure The tensions in the strings are $T_1=100 \: N \text{ and } T_2=0 \: N$ $T_1=0 \: N \text{ and } T_2=100 \: N$ $T_1=75 \: N \text{ and } T_2=25 \: N$ $T_1=25 \: N \text{ and } T_2=75 \: N$
A bar of uniform cross section and weighing $100 \:N$ is held horizontally using two massless and inextensible strings $S1$ and $S2$ as shown in the figureThe tensions in...
asked
Feb 17, 2018
Engineering Mechanics
gateme-2018-set1
engineering-mechanics
applied-mechanics-and-design
+
–
0
answers
0
votes
GATE2018-1-4
$F(z)$ is a function of the complex variable $z=x+iy$ given by $F(z)+ i \: z + k \: Re(z) + i \: Im(z)$. For what value of $k$ will $F(z)$ satisfy the Cauchy-Riemann equations? $0$ $1$ $-1$ $y$
$F(z)$ is a function of the complex variable $z=x+iy$ given by $F(z)+ i \: z + k \: Re(z) + i \: Im(z)$. For what value of $k$ will $F(z)$ satisfy the Cauchy-Riemann equa...
asked
Feb 17, 2018
Calculus
gateme-2018-set1
calculus
complex-variables
euler-cauchy-equations
+
–
0
answers
0
votes
GATE2018-1-3
According to the Mean Value Theorem, for a continuous function $f(x)$ in the interval $[a,b]$, there exists a value $\xi$ in this interval such that $\int_a^b f(x) dx = $ $f(\xi)(b-a)$ $f(b)(\xi-a)$ $f(a)(b-\xi)$ $0$
According to the Mean Value Theorem, for a continuous function $f(x)$ in the interval $[a,b]$, there exists a value $\xi$ in this interval such that $\int_a^b f(x) dx = $...
asked
Feb 17, 2018
Calculus
gateme-2018-set1
calculus
mean-value-theorems
definite-integrals
+
–
0
answers
0
votes
GATE2018-1-2
The rank of the matrix $\begin{bmatrix} -4 & 1 & -1 \\ -1 & -1 & -1 \\ 7 & -3 & 1 \end{bmatrix}$ is $1$ $2$ $3$ $4$
The rank of the matrix $\begin{bmatrix} -4 & 1 & -1 \\ -1 & -1 & -1 \\ 7 & -3 & 1 \end{bmatrix}$ is$1$$2$$3$$4$
asked
Feb 17, 2018
Linear Algebra
gateme-2018-set1
linear-algebra
matrices
rank-of-matrix
+
–
0
answers
0
votes
GATE2018-1-1
Four red balls, four green balls and four blue balls are put in a box. Three balls are pulled out of the box at random one after another without replacement. The probability that all the three balls are red is $1/72$ $1/55$ $1/36$ $1/27$
Four red balls, four green balls and four blue balls are put in a box. Three balls are pulled out of the box at random one after another without replacement. The probabil...
asked
Feb 17, 2018
Probability and Statistics
gateme-2018-set1
probability-and-statistics
probability
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 10
In the graph below, the concentration of a particular pollutant in a lake is plotted over (alternate) days of a month in winter (average temperature $10^{\circ} C$) and a month in summer (average temperature $30^{\circ} C$). Consider the ... in the winter month. Which one of the following options is correct? Only i Only ii Both i and ii Neither i nor ii
In the graph below, the concentration of a particular pollutant in a lake is plotted over (alternate) days of a month in winter (average temperature $10^{\circ} C$) and a...
asked
Feb 26, 2017
Quantitative Aptitude
gateme-2017-set2
numerical-ability
data-interpretation
line-graph
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 9
All people in a certain island are either 'Knights' or 'Knaves' and each person knows every other person's identity. Knights never lie, and Knaves ALWAYS lie. $P$ says "Both of us are Knights". $Q$ says "None of us are ... ; $Q$ is a Knave. Both $P$ and $Q$ are Knaves. The identities of $P, Q$ cannot be determined.
All people in a certain island are either 'Knights' or 'Knaves' and each person knows every other person's identity. Knights never lie, and Knaves ALWAYS lie.$P$ says "Bo...
asked
Feb 26, 2017
Analytical Aptitude
gateme-2017-set2
analytical-aptitude
logical-reasoning
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 8
There are $4$ women $P, Q, R, S$ and $5$ men $V, W, X, Y, Z$ in a group. We are required to form pairs each consisting of one woman and one man. $P$ is not to be paired with $Z$, and $Y$ must necessarily be paired with someone. In how many ways can $4$ such pairs be formed? $74$ $76$ $78$ $80$
There are $4$ women $P, Q, R, S$ and $5$ men $V, W, X, Y, Z$ in a group. We are required to form pairs each consisting of one woman and one man. $P$ is not to be paired w...
asked
Feb 26, 2017
Quantitative Aptitude
gateme-2017-set2
numerical-ability
counting
+
–
1
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 7
$X$ bullocks and $Y$ tractors take $8$ days to plough a field. If we have the number of bullocks and double the number of tractors, it takes $5$ days to plough the same field. How many days will it take $X$ bullocks alone to plough the field? $30$ $35$ $40$ $45$
$X$ bullocks and $Y$ tractors take $8$ days to plough a field. If we have the number of bullocks and double the number of tractors, it takes $5$ days to plough the same f...
asked
Feb 26, 2017
Quantitative Aptitude
gateme-2017-set2
numerical-ability
work-time
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 6
"If you are looking for a history of India, or for an account of the rise and fall of the British Raj, or for the reason of the cleaving of the subcontinent into two mutually antagonistic parts and the effects ... of these matters." Which of the following is closest in meaning to 'cleaving' ? deteriorating arguing departing splitting
"If you are looking for a history of India, or for an account of the rise and fall of the British Raj, or for the reason of the cleaving of the subcontinent into two mutu...
asked
Feb 26, 2017
Verbal Aptitude
gateme-2017-set2
verbal-aptitude
verbal-reasoning
passage-reading
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 5
$P$ looks at $Q$ while $Q$ looks at $R$. $P$ is married, $R$ is not. The number of pairs of people in which a married person is looking at an unmarried person is $0$ $1$ $2$ Cannot be determined.
$P$ looks at $Q$ while $Q$ looks at $R$. $P$ is married, $R$ is not. The number of pairs of people in which a married person is looking at an unmarried person is $0$$1$$2...
asked
Feb 26, 2017
Analytical Aptitude
gateme-2017-set2
analytical-aptitude
logical-reasoning
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 4
A couple has $2$ children. The probability that both children are boys if the older one is a boy is $1/4$ $1/3$ $1/2$ $1$
A couple has $2$ children. The probability that both children are boys if the older one is a boy is$1/4$$1/3$$1/2$$1$
asked
Feb 26, 2017
Quantitative Aptitude
gateme-2017-set2
numerical-ability
probability
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 3
If $a$ and $b$ are integers and $a-b$ is even, which of the following must always be even? $ab$ $a^{2}+b^{2}+1$ $a^{2}+b+1$ $ab-b$
If $a$ and $b$ are integers and $a-b$ is even, which of the following must always be even?$ab$$a^{2}+b^{2}+1$$a^{2}+b+1$$ab-b$
asked
Feb 26, 2017
Quantitative Aptitude
gateme-2017-set2
numerical-ability
algebra
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 2
If you choose plan $P$, you will have to _________ plan $Q$, as these two are mutually ________. forgot, exclusive forget, inclusive accept, exhaustive adopt, intrusive
If you choose plan $P$, you will have to _________ plan $Q$, as these two are mutually ________.forgot, exclusiveforget, inclusiveaccept, exhaustiveadopt, intrusive
asked
Feb 26, 2017
Verbal Aptitude
gateme-2017-set2
verbal-aptitude
word-pairs
+
–
0
answers
0
votes
GATE Mechanical 2017 Set 2 | GA Question: 1
The ways in which this game can be played _________ potentially infinite. is is being are are being
The ways in which this game can be played _________ potentially infinite.isis beingareare being
asked
Feb 26, 2017
Verbal Aptitude
gateme-2017-set2
verbal-aptitude
english-grammar
+
–
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