Aptitude and Reasoning Questions

Q:

What is the number that should come in the place of question mark ?

1050    420    168     67.2     ?

A) 19.11 B) 14.25
C) 10.752 D) 26.88
 
Answer & Explanation Answer: D) 26.88

Explanation:

Given series follows the rule of

1050/2.5 = 420
420/2.5 = 168
168/2.5 = 67.2
so 67.2/2.5 = 26.88

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Filed Under: Number Series
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17 50970
Q:

3, 11, 80, 291, 803

Find the odd man out of the number series?

A) 11 B) 803
C) 80 D) 291
 
Answer & Explanation Answer: C) 80

Explanation:

The given number series is 3, 11, 80, 291, 803

33 + 23 = 3 + 8 = 1111 + 43 = 11 + 64 = 75 (not 80)75 + 63 = 75 + 216 = 291291 + 83 = 291 + 512 = 803

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Filed Under: Odd Man Out
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3 50963
Q:

In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?

A) 360 B) 700
C) 720 D) 120
 
Answer & Explanation Answer: C) 720

Explanation:

The word 'OPTICAL' contains 7 different letters.

When the vowels OIA are always together, they can be supposed to form one letter.

Then, we have to arrange the letters PTCL (OIA).

Now, 5 letters can be arranged in 5! = 120 ways.

The vowels (OIA) can be arranged among themselves in 3! = 6 ways.

Required number of ways = (120 x 6) = 720.

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51 50947
Q:

A number is decreased by 10% and then increased by 10%.  The number so obtained is 10 less than the original number. What was the oiginal number ? 

A) 1000 B) 2000
C) 3000 D) 4000
 
Answer & Explanation Answer: A) 1000

Explanation:

Let the original number be x.

 

Final number obtained = 110% of (90% of x) =(110/100 * 90/100 * x) = (99/100)x. 

 

x-(99/100)x=10

=> x =1000

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Filed Under: Percentage

141 50902
Q:

50 men took a dip in a water tank 40 m long and 20 m broad on a religious day. If the average displacement of water by a man is 4 cu.m , then the rise in the water level in the tank will be:

A) 20 cm B) 25 cm
C) 35 cm D) 50 cm
 
Answer & Explanation Answer: B) 25 cm

Explanation:

Total volume of water displaced =(4 x 50) cu.m = 200 cu.m

 

Rise in water level = 20040×20=0.25m = 25cm

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64 50899
Q:

What is the first term of an arithmetic progression of positive integers ?

(I) Sum of the squares of the first and the second term is 116.

(II)The fifth term is divisible by 7.

A) Only a is sufficient B) Only b is sufficient
C) Both a & b are necessary D) None
 
Answer & Explanation Answer: A) Only a is sufficient

Explanation:

The sum of square of two no is 116 i.e no lie 1-11, because 11x11 =121 which is greater than 116
again after cheaking all possible pair of no only 4 and 10 satisfy this condsn , again the progression is of positive integer so 10 cant not be 1st term
so the 1st term is 4,
but from the 2nd we cant able to find the 1st term

so only 1st statement is sufficient to answer the question

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Filed Under: Statement and Conclusions
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2 50881
Q:

Find the value of  21623 + 36-1   2

 

A) 216/6 B) 218/6
C) 215/6 D) 217/6
 
Answer & Explanation Answer: D) 217/6

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

0 50820
Q:

If 18$6 = 6, 8$2 = 3 and 8$4 = 2, then find the value of 18$12 = ?

 

A) 3 B) -8
C) 4 D) 6
 
Answer & Explanation Answer: A) 3

Explanation:
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Filed Under: Coding and Decoding
Exam Prep: Bank Exams

2 50780