Quantitative Aptitude - Arithmetic Ability Questions

Q:

Find the missing number in the given number series?

2676, 445, ?, 21,6, 2, 1

A) 88 B) 92
C) 96 D) 102
 
Answer & Explanation Answer: A) 88

Explanation:

The given number series 2676, 445, ?, 21,6, 2, 1 follows a pattern that,

From right side,

1

1 x 1 + 1 = 2

2 x 2 + 2 = 6

6 x 3 + 3 = 21

21 x 4 + 4 = 88

88 x 5 + 5 = 445

445 x 6 + 6 = 2676

 

Hence the missing number in the given number series is 88.

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5 47500
Q:

If (x- 7)2 + (y + 10)2 + (z - 6)2 = 0, then find the value of x + y+ z.

 

A) 1 B) 3
C) 5 D) 7
 
Answer & Explanation Answer: B) 3

Explanation:
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Filed Under: Simplification
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1 47481
Q:

A housewife saved Rs. 2.50 in buying an item on sale. If she spent Rs. 25 for the item, approximately how much percent she saved in the transaction ?

A) 8 B) 9
C) 10 D) 11
 
Answer & Explanation Answer: B) 9

Explanation:

Actual price = Rs. (25 + 2.50) = Rs. 27.50. 

 

Saving = 2.50

 

Percentage Saving = [(2.50/27.50)*100]

 

= 2500/275

 

9111%

 

9%

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Filed Under: Percentage

111 47349
Q:

Compute of 15872/32/4 = ?

 

A) 142 B) 1984
C) 124 D) 1948
 
Answer & Explanation Answer: C) 124

Explanation:
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2 47321
Q:

Find the odd man out?

61, 66, 83, 121, 185

A) 185 B) 121
C) 83 D) 66
 
Answer & Explanation Answer: B) 121

Explanation:

Given number series is 61, 66, 83, 121, 185

Here the given series follows a pattern that,

 

6161 + 22 + 1 = 6666 + 42 + 1 = 8383 + 62 + 1 = 120 (not 121)120 + 82 + 1 = 185

 

 

Hence, the odd man in the given series is 121.

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3 47314
Q:

What is the square root of (√5 + 2)/(√5 – 2)?

 

A) √5 – √4   B) √5 + 2  
C) 5 + √2   D) 7
 
Answer & Explanation Answer: B) √5 + 2  

Explanation:
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1 47253
Q:

Consider the following two triangles as shown in the figure below.


Choose the correct statement for the above situation.

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

Explanation:
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Filed Under: Volume and Surface Area
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0 47126
Q:

In a class, 30% of the students offered English, 20% offered Hindi and 10% offered both. If a student is selected at random, what is the probability that he. has offered English or Hindi ?

A) 1/2 B) 3/4
C) 4/5 D) 2/5
 
Answer & Explanation Answer: D) 2/5

Explanation:

3729a.jpg

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Filed Under: Probability

76 47091