6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

If √21 = 4.58, then the simplified value of $(8 \sqrt{\frac{3}{7}} - 3 \sqrt{\frac{7}{3}})$

A) 0.474	B) 0.752
C) 0.655	D) 1

Answer & Explanation Answer: C) 0.655

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 86515

Q:

A, B, C started a business with their investments in the ratio 1:3 :5. After 4 months, A invested the same amount as before and B as well as C withdrew half of their investments. The ratio of their profits at the end of the year is :

A) 1 : 2 : 3	B) 3 : 4 : 15
C) 3 : 5 : 10	D) 5 : 6 : 10

Answer & Explanation Answer: D) 5 : 6 : 10

Explanation:

Let their initial investments be x, 3x and 5x respectively. Then,

A:B:C = (x*4+2x*8) : (3x*4+(3x/2)*8) : (5x*4+(5x/2)*8)

20x : 24x : 40x = 5 : 6 : 10

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Filed Under: Partnership

207 86451

Q:

Find the next number in the following number series?

410, 409, 413, 404, ?

A) 412	B) 415
C) 418	D) 420

Answer & Explanation Answer: D) 420

Explanation:

The given number series 410, 409, 413, 404, ? , follows a pattern that

410

$410 - 1^{3} = 409 409 + 2^{2} = 413 413 - 3^{3} = 404 404 + 4^{2} = 420$

Hence, the next number in the given series is 420.

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

4 86435

Q:

Solve the following :

196 - 19.6 - 1.96 - 0.196 = ?

A) 173.254	B) 173.234
C) 174.234	D) 174.244

Answer & Explanation Answer: D) 174.244

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 85890

Q:

A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is :

A) 45	B) 40
C) 39	D) 37

Answer & Explanation Answer: B) 40

Explanation:

Let there be x pupils in the class.

Total increase in marks = (x * 1/2) = x/2.

x/2 = (83 - 63) => x/2 = 20 => x = 40.

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Filed Under: Average

201 84913

Q:

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?

A) 0	B) -1
C) 1	D) none of these

Answer & Explanation Answer: A) 0

Explanation:

Average of 20 numbers = 0.

Sum of 20 numbers = (0 * 20) = 0.

It is quite possible that 19 of these numbers may be positive and if their sum is a, then 20th number is (- a).

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Filed Under: Average

279 84808

Q:

Direction: What should come in the place of question mark (?) in the following number series?

7, 10, 16, 28, ?, 100

A) 34	B) 40
C) 52	D) 60

Answer & Explanation Answer: C) 52

Explanation:

The pattern followed is +3 , +6 , +12 , +24 , +48

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

0 84804

Q:

The length of a diagonal in cms of a rectangle of length 5 cm and width 3 cm is

A) √34	B) +-√34
C) 4	D) +-4

Quantitative Aptitude - Arithmetic Ability Questions

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