6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

3 : 12 :: 5 : ?

A) 17	B) 30
C) 26	D) 32

Answer & Explanation Answer: B) 30

Explanation:

$3 3^{2} + 3 = 12 5 5^{2} + 5 = 30$

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Filed Under: Ratios and Proportions
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
Job Role: Bank Clerk , Bank PO

75 17436

Q:

Abhinav scores 80% in physics and 66% in chemistry and the maximum marks of both the papers are 100. what percent does he score in maths which is of 200 marks, if he scores 80% marks in all the three subjects:

A) 74%	B) 84%
C) 87%	D) 83%

Answer & Explanation Answer: C) 87%

Explanation:

$\frac{80}{100} + \frac{66}{100} + \frac{x}{200} = \frac{320}{400}$

=>x = 174 => 87%

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Filed Under: Percentage

31 17420

Q:

If log 64 = 1.8061, then the value of log 16 will be (approx)?

A) 1.9048	B) 1.2040
C) 0.9840	D) 1.4521

Answer & Explanation Answer: B) 1.2040

Explanation:

Given that, log 64 = 1.8061

i.e $\log (4^{3}) = 1.8061$

--> 3 log 4 = 1.8061

--> log 4 = 0.6020

--> 2 log 4 = 1.2040

$\Rightarrow \log (4^{2}) = 1.2040$

Therefore, log 16 = 1.2040

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Filed Under: Logarithms
Exam Prep: CAT
Job Role: Bank Clerk

50 17349

Q:

The ages of X and Y are in the proportion of 6:5 and total of their ages is 44 years. The proportion of their ages after 8 years will be

A) 3:6	B) 6:3
C) 8:7	D) 9:5

Answer & Explanation Answer: C) 8:7

Explanation:

Let current ages of X and Y correspondingly, is 6A & 5A
Given: 6A + 5A = 44
=> A = 4
Proportion of ages after 0.8 decades will be
6A + 8 : 5A + 8 $\Leftrightarrow$ 32:28 (or) 8:7

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Filed Under: Problems on Ages

22 17346

Q:

The sum of a proper fraction and its reciprocal is 61/30. Find the fraction.

A) 1/3	B) 5/6
C) 3/10	D) 3/5

Answer & Explanation Answer: B) 5/6

Explanation:

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

0 17341

Q:

The perimeter of a square is 22 cm. Find its area (in cm2).

A) 60.5	B) 22.5
C) 45	D) 30.25

Answer & Explanation Answer: D) 30.25

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

0 17341

Q:

The perimeter of a square is 26 cm. Find its area (in cm2).

A) 42.25	B) 84.5
C) 39.25	D) 78.5

Answer & Explanation Answer: A) 42.25

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

0 17332

Q:

4 kg of a metal contains 1/5 copper and rest in Zinc. Another 5 kg of metal contains 1/6 copper and rest in Zinc.The ratio of Copper and Zinc into the mixture of these two metals:

A) 49 : 221	B) 39:231
C) 94:181	D) None of these

Answer & Explanation Answer: A) 49 : 221

Explanation:

Copper in 4 kg = 4/5 kg and Zinc in 4 kg = 4 x (4/5) kg

Copper in 5 kg = 5/6 kg and Zinc in 5 kg = 5 x (5/6) kg

Therefore, Copper in mixture = $\frac{4}{5} + \frac{5}{6} = \frac{49}{30}$ kg

and Zinc in the mixture = $\frac{16}{5} + \frac{25}{6} = \frac{221}{30}$ kg

Therefore the required ratio = 49 : 221

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Filed Under: Alligation or Mixture

30 17331

Quantitative Aptitude - Arithmetic Ability Questions

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