CAT Questions

Q:

Can you solve the Math Puzzle ?

solve_the_puzzle1499666934.jpg image

A) 12 B) 15
C) 17 D) 19
 
Answer & Explanation Answer: B) 15

Explanation:

The puzzle's logic is

1st figure : (9-7) + (8-5) = 2 + 3 = 5

2nd figure : (15-6) + (11-2) = 9 + 9 = 18

similarly, 3rd figure : (9-6) + (17-5) = 3 + 12 = 15.

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Filed Under: Math Puzzles
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32 10800
Q:

A heap of coconuts is divided into groups of 2, 3 and 5 and each time one coconut is left over. The least number of Coconuts in the heap is  ?

A) 63 B) 31
C) 16 D) 27
 
Answer & Explanation Answer: B) 31

Explanation:

To get the least number of coconuts :
LCM = 30 => 30 + 1 = 31

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Filed Under: HCF and LCM
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33 10797
Q:

Draw the Judgement from the following passage ?

Mrs. Carson took a taxi to meet her three friends for lunch. They were waiting for her outside the restaurant when she pulled up in the car. She was so excited to see her friends that she left her tote bag in the taxi. As the taxi pulled away, she and her friends took notice of the license plate number so they would be able to identify the car when they called the taxi company. The four license plate numbers below represent what each of the four women thinks she saw.

Which one is most likely the license plate number of the taxi ?

A) JYK 12L B) JXK 12I
C) JXX 12L D) JXK 12L
 
Answer & Explanation Answer: D) JXK 12L

Explanation:

The four women seem to agree that the plate starts out with the letter J. Three of them agree that the plate ends with 12L. Three of them think that the second letter is X, and a different three think that the third letter is K. The plate description that has all of these common elements is D.

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Filed Under: Statement and Arguments
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2 10787
Q:

Today is Varun's birthday. One year, from today he will be twice as old as he was 12 years ago. How old is Varun today ?

A) 25 years B) 24 years
C) 23 years D) 22 years
 
Answer & Explanation Answer: A) 25 years

Explanation:

Let varun's age = x yrs.

From the given conditions,

x+1  =  2(x-12)

x = 25 years.

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Filed Under: Problems on Ages
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14 10777
Q:

The sum of the interior angles of a polygon is twice the sum of its exterior angles. How many sides does the polygon have ?

A) 6 B) 4
C) 5 D) 7
 
Answer & Explanation Answer: A) 6

Explanation:

We know that

Sum of Interior angles of Polygon = 180(n-2)
Sum of Exterior angles of Polygon = 360
so 180(n-2)=2x360
Therefore, by solving we get n=6 sides.

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Filed Under: Arithmetical Reasoning
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22 10772
Q:

Three maths classes: A, B and C take an algebra test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. What is the average score of classes A, B, C ?

A) 81 B) 78
C) 80.5 D) 81.5
 
Answer & Explanation Answer: D) 81.5

Explanation:

Let the number of students in classes A, B and C be P, Q and R respectively.
Then, total score of A = 83P, total score of B = 76Q, total score of C = 85R.
Also given that,
(83P + 76Q) / (P + Q) = 79
=>4P = 3Q.
(76Q + 85R)/(Q + R) = 81
=>4R = 5Q,
=>Q = 4P/3 and R = 5P/3
Therefore, average score of A, B, C = ( 83P + 76Q + 85R ) / (P + Q + R) = 978/12 = 81.5

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Filed Under: Average
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12 10767
Q:

Which of the following is not a compound?

A) Brass B) Quick lime
C) Marble D) Soda ash
 
Answer & Explanation Answer: A) Brass

Explanation:

Among the given options Brass is not a compound. Since it is an alloy, it is a mixture. It is a mixture of copper and zinc.

Which_of_the_following_is_not_a_compound1558074260.jpg image

 

 

 

The smallest part of a compound is called a molecule. It has a unique composition that is always the same.

 

Compound is a substance that consists of two or more elements. 

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Filed Under: Chemistry
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12 10758
Q:

Sandhya's birthday falls on 15th August and Minu's birthday falls on 25th June. If Minu's birthday was on Wednesday, what was the day on Sandhya's birthday in the same year?

A) Friday B) Monday
C) Tuesday D) Saturday
 
Answer & Explanation Answer: A) Friday

Explanation:

Total days from 25th June to 15th August = 5 + 31 + 15 = 51 days

 

 

 

51/7  = 7 weeks and 2 days 

 

 

 

August 15 = Wednesday + 2 = Friday

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Filed Under: Number, Ranking and Time Sequence Test
Exam Prep: CAT , Bank Exams
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21 10757