Aptitude and Reasoning Questions

Q:

The sum of the first 10 prime numbers is

A) even B) odd
C) 0 D) none
 
Answer & Explanation Answer: B) odd

Explanation:

To find the sum of first 10 prime numbers

First 10 prime numbers = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

 

Hence, The sum of the first 10 prime numbers is

(2+3+5+7+11+13+17+19+23+29) = 129 (ODD Number).

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Filed Under: Arithmetical Reasoning
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Q:

How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed ?

A) 5040 B) 2525
C) 2052 D) 4521
 
Answer & Explanation Answer: A) 5040

Explanation:

The Word LOGARITHMS  contains 10 letters.

To find how many 4 letter words we can form from that = P410 =10x9x8x7 = 5040.

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Filed Under: Permutations and Combinations
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Q:

In a certain code language, "CONDITION" is written as "@#^$*!*#^". How is "NOTION" written in that code language?

A) ^#!*^# B) ^!#*#^
C) ^#*!#^ D) ^#!*#^
 
Answer & Explanation Answer: D) ^#!*#^

Explanation:
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Filed Under: Coding and Decoding
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Q:

A motorboat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the motorboat and speed of the water current respectively?

A) 3:7 B) 7:9
C) 5:4 D) 8:3
 
Answer & Explanation Answer: D) 8:3

Explanation:

Let the man's rate upstream be x kmph and that downstream be y kmph.

Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.

x x 8 4 = (y x 4)
5
44 x =4y
5
 y = 11 x.
5
 Required ratio = y + x : y - x
2 2
   = 16x x 1 : 6x x 1
5 2 5 2
   = 8 : 3
5 5

   = 8 : 3.

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Filed Under: Boats and Streams
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Q:

Find out which of the answer figures (a), (b), (c) and (d) completes the figure matrix ?

A) a B) b
C) c D) d
 
Answer & Explanation Answer: A) a

Explanation:

The number of components in each row either increases or decreases from left to right . In the third row, it increases.

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Filed Under: Figure Matrix

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Q:

Which of the diagrams given below correctly represents the relationship among WOMEN, MOTHERS, SPINSTERS

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

Explanation:
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Filed Under: Logical Venn Diagram

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Q:

In a certain code language, '-' represents '+', '+' represents 'x', 'x' represents '÷' and '÷' represents '-'. Find out the answer to the following question.

2 - 12 + 10 x 5 ÷ 12 = ?

A) 32 B) 8
C) 4 D) 14
 
Answer & Explanation Answer: D) 14

Explanation:
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Filed Under: Coding and Decoding
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Q:

The ages of Sunitha and Pranitha are 40 years and 60 years, respectively. How many years before the ratio of their ages was 3 : 5?

A) 10 years B) 15 years
C) 18 years D) 24 years
 
Answer & Explanation Answer: A) 10 years

Explanation:

Given the ages of Sunitha and Pranitha are 40 years and 60 years.

Let before 'm' years, their ages be in the ratio of 3 : 5

ATQ,

40-m60-m = 35

=> 200 - 5m = 180 - 3m

=>2m = 20

=> m = 10 years.

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Filed Under: Problems on Ages
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