Aptitude and Reasoning Questions

Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

 

15 x 2 + 10 - 8 ÷ 20 = 15

 

A) - and + B) ÷ and x
C) + and ÷ D) x and -
 
Answer & Explanation Answer: C) + and ÷

Explanation:
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Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

 

12 + 8 - 25 ÷ 10 x 18 = 14

 

A) ÷ and - B) + and ÷
C) - and + D) x and -
 
Answer & Explanation Answer: D) x and -

Explanation:
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Filed Under: Coding and Decoding
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Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

 

90 ÷ 10 + 5 - 6 x 4 = 28

 

A) - and + B) ÷ and x
C) x and - D) ÷ and -
 
Answer & Explanation Answer: A) - and +

Explanation:
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Filed Under: Coding and Decoding
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Q:

9 men and 12 boys finish a job in 12 days, 12 men and 12 boys finish it in 10 days. 10 men and 10 boys shall finish it in how many days ?

A) 15 days B) 11 days
C) 14 days D) 12 days
 
Answer & Explanation Answer: D) 12 days

Explanation:

9M + 12B ----- 12 days ...........(1)
12M + 12B ------- 10 days........(2)
10M + 10B -------?
108M + 144B = 120M +120B
24B = 12M => 1M = 2B............(3)

From (1) & (3)

18B + 12B = 30B ---- 12 days

20B + 10B = 30B -----? => 12 days.

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22 25624
Q:

If the letters of the word CHASM are rearranged to form 5 letter words such that none of the word repeat and the results arranged in ascending order as in a dictionary what is the rank of the word CHASM ?

A) 32 B) 24
C) 72 D) 36
 
Answer & Explanation Answer: A) 32

Explanation:

The 5 letter word can be rearranged in 5!=120 Ways without any of the letters repeating.

The first 24 of these words will start with A.

Then the 25th word will start will CA _ _ _.
The remaining 3 letters can be rearranged in 3!=6 Ways. i.e. 6 words exist that start with CA.

The next word starts with CH and then A, i.e., CHA _ _.
The first of the words will be CHAMS. The next word will be CHASM.

Therefore, the rank of CHASM will be 24+6+2= 32

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17 25617
Q:

Arrange the given words in the sequence in which they occur in the dictionary.

i. Terrace
ii. Tenant
iii. Tea
iv. Tomorrow

 

A) iii, ii, i, iv B) i, ii, iii, iv
C) iv,i, ii, iii D) i, iii, ii, iv
 
Answer & Explanation Answer: A) iii, ii, i, iv

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Q:

A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days  ?

A) 9 days B) 11 days
C) 13 days D) 15 days
 
Answer & Explanation Answer: C) 13 days

Explanation:

Ratio of times taken by A and B = 100 : 130 = 10 : 13.
Suppose B takes x days to do the work.

Then, 10 : 13 :: 23 : x     =>     x = ( 23 x 13/10 )     =>     x = 299 /10.

A's 1 day's work = 1/23 ;
B's 1 day's work = 10/299 .

(A + B)'s 1 day's work = ( 1/23 + 10/299 ) = 23/299 = 113 .

Therefore, A and B together can complete the work in 13 days. 

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52 25596
Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

21 + 16 x 35 - 70 ÷ 20 = 9

 

A) + and x B) + and ÷
C) - and + D) ÷ and -
 
Answer & Explanation Answer: D) ÷ and -

Explanation:
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