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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

(a - b)2 + 2ab = ?

 

A) a2 - b2 B) a2 + b2
C) a2 - 4ab + b2 D) a2 -  2ab + b2
 
Answer & Explanation Answer: B) a2 + b2

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

4 99683
Q:

What number should replace the question mark?

125, 138, 164, ?, 255

A) 189 B) 197
C) 200 D) 203
 
Answer & Explanation Answer: D) 203

Explanation:

The given number series is 125,   138,   164,   ?,   255

 

125

 

125 + 13x1 = 138

 

138 + 13x2 = 164

 

164 + 13x3 = 203

 

203 + 13x4 = 255

 

 

 

Hence, the missing number in the series is 203.

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Filed Under: Odd Man Out
Exam Prep: GATE , CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

5 99521
Q:

Solve the following :

 

123 + 12.3 + 1.23 + 0.123 + 0.0123 = ?

A) 136.7659 B) 136.653
C) 136.6653 D) 136.7760
 
Answer & Explanation Answer: C) 136.6653

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

2 99460
Q:

Fresh fruit contains 68% water and dry fruit contains 20% water. How much dry fruit can be obtained from 100 kg of fresh fruits ?

A) 20 B) 30
C) 40 D) 50
 
Answer & Explanation Answer: C) 40

Explanation:

The fruit content in both the fresh fruit and dry fruit is the same.

 

Given, fresh fruit has 68% water.so remaining 32% is fruit content. weight of fresh fruits is 100kg

 

Dry fruit has 20% water.so remaining 80% is fruit content.let weight if dry fruit be y kg.

 

Fruit % in freshfruit = Fruit% in dryfruit 

 

Therefore, (32/100) x 100 = (80/100 ) x y 

 

we get, y = 40 kg.

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Filed Under: Percentage
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

1210 99273
Q:

The value of a machine depreciates at the rate of 10% every year. It was purchased 3 years ago. If its present value is Rs. 8748, its purchase price was :

A) 10000 B) 12000
C) 14000 D) 16000
 
Answer & Explanation Answer: B) 12000

Explanation:

Purchase price = Rs.87481-101003 = Rs. [8748 * (10/9) * (10/9 )* (10/9)] = Rs.12000

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Filed Under: Percentage

726 98942
Q:

The perimeter of a square is 34 cm. Find its area (in cm2).

 

A) 144.5   B) 82.25  
C) 164.5   D) 72.25
 
Answer & Explanation Answer: D) 72.25

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

3 98713
Q:

In the following question, select the odd letter/letters from the given alternatives.

 

A) ABDG B) PQSV
C) JKMQ D) NOQT
 
Answer & Explanation Answer: C) JKMQ

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

5 98226
Q:

if the price of a book is first decreased by 25% and then increased by 20%, then the net change in the price will be  : 

A) 10 B) 20
C) 30 D) 40
 
Answer & Explanation Answer: A) 10

Explanation:

Let the original price be Rs. 100.

New final price  = 120 %  of (75 % of Rs. 100) = Rs. [(120/100) * (75/100) * 100] = Rs. 90.

Decrease = 10%

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Filed Under: Percentage

511 97893