GATE Questions and Answers with Explanation

Q:

Which planet rotates clockwise?

A) Uranus	B) Saturn
C) Venus	D) Earth

Answer & Explanation Answer: C) Venus

Explanation:

Venus is the only planet that rotates in clockwise where all other planets in the solar system rotates in anti - clockwise direction.

which_planet_rotates_clockwise1556602727.jpg image

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Filed Under: General Science
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Q:

Eighteen years ago, a mother was three times as old as her daughter. Now the mother is only twice as old as her daughter. Then the sum of the present ages of daughter and the mother is ?

A) 84 yrs	B) 96 yrs
C) 116 yrs	D) 108 yrs

Answer & Explanation Answer: D) 108 yrs

Explanation:

Let the present ages of the mother and daughter be 2x and x years respectively.
Then, (2x - 18) = 3(x - 18) => x = 36
Required sum = (2x + x) = 108 years.

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Filed Under: Problems on Ages
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Q:

Praveena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest ?

A) 6	B) 7
C) 9	D) 11

Answer & Explanation Answer: A) 6

Explanation:

Let rate = R% and time = R years.

Then, (1200 x R x R) / 100 = 432

=> R = 6.

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Filed Under: Simple Interest
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Q:

Dhoni ,Raina ,Kohli and Sikhar have all played 5 innings each and each scored 131 runs.The players Score Card is given below : 100,90,85,80,30,25,20,20,15,15,10,10,10,3,3,3,2,1,1,1.

Given hints are:

1. Dhoni & Raina have scored different runs in 4 innings however in one innings they have scored same runs.

2. Shikhar & Kohli have also scored different runs in 3 innings however their indivitual score is same throughout 2 innings(meaning each has scored same run twice in 2 innings).

3. Shikhar's highest score is greater than that of Kohli's highest score.

4. Only Shikhar has scored more than 1 run in each innings.

5. Raina's hiighest score is greater than that of Dhoni's highest score.

Questions :

1. Who scored century in one innings ?
2. Who scored 35 runs in 2 consecutive innings ?
3. Who scored 30 runs in one innings ?

Answer

Scores of individuals :

Dhoni= 80,30,10,10,1
Raina=100,25,3,2,1
Kholi=85,20,15,10,1
Shikhar=90,20,15,3,3

Above combination satisfies all conditions given in the question.

Answer 1) Raina

Answer 2) Kohli and Shikhar

Answer 3) Dhoni

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Subject: Deriving Conclusions From Passages Exam Prep: TOEFL , GRE , GATE , CAT , Bank Exams , AIEEE
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Q:

A Bus travels first half distance between two places with a speed of 40 kmph and the rest half distance with a speed of 60 kmph. The average speed of the Bus is ?

A) 48 kmph	B) 50 kmph
C) 46 kmph	D) 42 kmph

Answer & Explanation Answer: A) 48 kmph

Explanation:

we know that speed = distance traveled/time taken
let the total distance traveled by the car is 2x km.
then time taken by it to cover first half is x/60 hour.
and for second half is x/40 hour.
Then average speed= total distance travelled / total time taken.

i.e. $\frac{2 x}{[\frac{x}{60} + \frac{x}{40}]}$

=> $\frac{2 x}{\frac{5 x}{120}}$

= 48 kmph.

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Filed Under: Time and Distance
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Q:

Add is to multiply as subtract is to

A) fraction	B) divide
C) decimal	D) None of the above

Answer & Explanation Answer: B) divide

Explanation:

Here if you observe, add and subtract are opposite in nature. Similarly, mutiply and divide are also opposite in nature.

Hence, Add : Multiply :: Subtract : Divide.

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Filed Under: Analogy
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Q:

Oar is to rowboat as foot is to

A) Walk	B) Loafers
C) Skateboard	D) Running

Answer & Explanation Answer: C) Skateboard

Explanation:

A rowboat can be put into motion by using oar. Similaarly, a skateboard can be put into motion by using foot.

The other options like walk and running are not objects to be in motion. And loafers are something worn on foot.

Hence, Oar : Rowboat :: Foot : Skateboard.

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Filed Under: Analogy
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Q:

There are n boxes and m fruits. If we put 3 fruits in each box 3 fruits will be excess. If we put 4 fruits in each box 1 box will be excess. Find number of boxes and fruits ?

A) 3 & 9	B) 6 & 19
C) 7 & 24	D) 5 & 18

Answer & Explanation Answer: C) 7 & 24

Explanation:

7 boxes & 24 Balls.
Let, n = No. of boxes ; m = No. of fruits
3n+3 = m---------->(1)
4(n-1)= m---------->(2)
=>4n-4 = 3n+3;
=>4n-3n = 4+3
n = 7
Put n=7 in eqn(1)
=> 3(7)+3 = m
21+3 = m
m = 24;

Number of boxes = 7 and fruits = 24

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Filed Under: Arithmetical Reasoning
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