GRE Questions

Q:

If 78K928L is divisible by 6, then which of the following can Q and R take ?

A) K=2 & L=3 B) K=1 & L=4
C) K=1 & L=2 D) K=3 & L=3
 
Answer & Explanation Answer: B) K=1 & L=4

Explanation:

As per divisibility rule a number is divisible by 6 means it should be divisible by 2 and 3

case 1 : the divisibility rule for 2 is the number should be end with even number
in this case R =2 & R=4


case 2 : The divisibility rule for 3 is the sum of numbers should be divisible by 3
so if we take option (2) Q=1 & R=4 the sum is 39
if we take option (3) Q=1 & R=2 the sum is 37

So Option (2) is correct 39 is divided by 3

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Filed Under: Problems on Numbers
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4 4096
Q:

The Indian to beat the computers in mathematical wizardry is

A) Shakuntala Devi B) Raja Ramanna
C) Rina Panigrahi D) Ramanujam
 
Answer & Explanation Answer: A) Shakuntala Devi

Explanation:
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3 4091
Q:

Alone I am 24th, with a friend I am 20. Another friend and I am unclean. What am I?

Answer

The answer is 'X'.


1. It is the 24th letter in the alphabetical order.


2. XX (20 in Roman)


3. XXX is used to refer dirty.

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7 4088
Q:

Two trains running in opposite directions cross a pole placed on the platform in 47 seconds and 31 seconds respectively. If they cross each other in 33 seconds, what is the ratio of their speeds?

A) 1:7 B) 7:1
C) 2:3 D) 3:2
 
Answer & Explanation Answer: A) 1:7

Explanation:

Let the speed of the trains be x and y respectively
length of train1 = 47x
length of train2 = 31y
Relative speed= x + y
Time taken to cross each other = 33 s
=> 47x+31yx+y= 33
=> (47x + 31 y) = 33(x + y)
=> 14x = 2y
=> x/y = 2/14 = 1/7

 = 1:7

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Filed Under: Time and Distance
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4 4067
Q:

How many Teaspoons in a Tablespoon?

A) 4 B) 5
C) 2 D) 3
 
Answer & Explanation Answer: D) 3

Explanation:

Tablespoon > Teaspoon

In US & UK, 1 Tablespoon = 3 Teaspoons.

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7 4057
Q:

Dot cabs company provides cabs for software employees. The company has 8 Swift dzires, 6 Scorpios, 7 Innovas and few small cars. If Swift dzire makes one fourth of the total fleet, how many small cars are there in the company ?

A) 9 B) 10
C) 11 D) 12
 
Answer & Explanation Answer: C) 11

Explanation:

Given the company has 8 SD + 6 SRP + 7 IN = 21 cars + 'x' small cars.
Given SD makes 1/4 th of the total fleet.
=> 8 = 1/4 (21 + x)
=> 32 = 21 + x
=> x = 11
Therefore, the company has 11 small cars.

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Filed Under: Percentage
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3 4038
Q:

Study of fishes is called

A) Amphiology B) Phylumology
C) Zoology D) Ichthyology
 
Answer & Explanation Answer: D) Ichthyology

Explanation:

Ichthyology is the branch of biology devoted to the study of fish.

 

It is also known as Fish science which includes bony fishes (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha).

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Filed Under: General Science
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7 4036
Q:

21st letter of the alphabet is a Consonant.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

We know there are 26 alphabets in English. The 21st letter in the alphabet is 'U'.


We have 5 vowels and 21 consonants.


Vowels :: A, E, I, O, U.


U is not consonant and is a vowel.


 


Hence, the given statement that 21st letter in the alphabet i.e, U is consonant is a FALSE.

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7 4019