6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

What should come in place of question mark (?) in the following question? (You do not have to calculate the exact value.)

(√80.997 - √25.001) × (√120.98 + √16.02) = ?

A) 20	B) 30
C) 40	D) 50

Answer & Explanation Answer:

Explanation:

Ans.
Approximating the values:
(√81 - √25) × (√121 + √16) = ?
(9 - 5) × (11 + 4) = ?
4 × 15 = ?
? = 60

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Filed Under: Simplification
Exam Prep: AIEEE , Bank Exams , GATE

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Q:

A boat moves down stream at the rate of 8km/hr. and upstream at 4Km/hr. The speed of the boat in still waters is:

A) 4.5 km/hr.	B) 5 km/hr.
C) 6 km/hr.	D) 6.4 km/hr.

Answer & Explanation Answer: C) 6 km/hr.

Explanation:

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Filed Under: Boats and Streams
Exam Prep: Bank Exams

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Q:

Select the odd word/letters/number/number pair from the given alternatives.

A) Perpendicular	B) Base
C) Hypotenuse	D) Radius

Answer & Explanation Answer: D) Radius

Explanation:

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

What is the HCF (highest common factor) of 57 and 513?

A) 10	B) 57
C) 3	D) 27

Answer & Explanation Answer: B) 57

Explanation:

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Filed Under: HCF and LCM
Exam Prep: Bank Exams

9 2221

Q:

If 3x + 4y – 2z + 9 = 17, 7x + 2y + 11z + 8 = 23 and 5x + 9y + 6z – 4 = 18, then what is the value of x + y + z – 34?

A) – 28	B) – 14
C) – 31	D) – 45

Answer & Explanation Answer: C) – 31

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

What is the value of $\sqrt{3^{4} + 12^{2}} ?$

A) 13	B) 15
C) 17	D) 19

Answer & Explanation Answer: B) 15

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If $\sqrt{3^{n}} = 2187$ , then the value of n is:

A) 13	B) 14
C) 15	D) 16

Answer & Explanation Answer: B) 14

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If $x^{2} + x = 19$ , then what is the value of ${(x + 5)}^{2} + [1 / {(x + 5)}^{2}]$ ?

A) 77	B) 79
C) 81	D) 83

Quantitative Aptitude - Arithmetic Ability Questions

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