6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Find the missing number?

15, 30, ? , 40, 8, 48

A) 21	B) 8
C) 19	D) 10

Answer & Explanation Answer: D) 10

Explanation:

Given nuber series is 15, 30, ? , 40, 8, 48

Here the number series follows a pattern that

15

15 x 2 = 30

30 $\div$ 3 = 10

10 x 4 = 40

40 $\div$ 5 = 8

8 x 6 = 48

Hence, the missing number in the series is 10.

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Filed Under: Odd Man Out
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
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27 271403

Q:

A and B invest in a business in the ratio 3 : 2. If 5% of the total profit goes to charity and A's share is Rs. 855, the total profit is :

A) 500	B) 1000
C) 1500	D) 2000

Answer & Explanation Answer: C) 1500

Explanation:

Let the total profit be Rs. 100.

After paying to charity, A's share = (95*3/5) = Rs. 57.

If A's share is Rs. 57, total profit = Rs. 100.

If A's share is Rs. 855, total profit = (100/57*855) = 1500.

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Filed Under: Partnership

737 267778

Q:

Insert the missing number.

7, 26, 63, 124, 215, 342, (....)

A) 391	B) 421
C) 481	D) 511

Answer & Explanation Answer: D) 511

Explanation:

Numbers are (2³ - 1), (3³ - 1), (4³ - 1), (5³ - 1), (6³ - 1), (7³ - 1) etc.

So, the next number is (8³ - 1) = (512 - 1) = 511.

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Filed Under: Odd Man Out

401 248755

Q:

Find the odd man out.

41, 43, 47, 53, 61, 71, 73, 81

A) 41	B) 61
C) 71	D) 81

Answer & Explanation Answer: D) 81

Explanation:

Each of the numbers except 81 is a prime number.

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Filed Under: Odd Man Out

167 233405

Q:

Simplify

$\frac{1 . 5^{3} + 4 . 7^{3} + 3 . 8^{3} - 3 x 1.5 x 4.7 x 3.8}{1 . 5^{2} + 4 . 7^{2} + 3 . 8^{2} - 1.5 x 4.7 - 4.7 x 3.8 - 1.5 x 3.8}$

A) 6	B) 8
C) 10	D) 12

Answer & Explanation Answer: C) 10

Explanation:

Apply $\frac{a^{3} + b^{3} + c^{3} - 3 a b c}{a^{2} + b^{2} + c^{2} - a b - b c - c a} = a + b + c$

Hence the answer is 1.5 + 4.7 + 3.8 = 10.

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Filed Under: Simplification
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

35 233322

Q:

A bag contains 50 P, 25 P and 10 P coins in the ratio 5: 9: 4, amounting to Rs. 206. Find the number of coins of each type respectively.

A) 360, 160, 200	B) 160, 360, 200
C) 200, 360,160	D) 200,160,300

Answer & Explanation Answer: C) 200, 360,160

Explanation:

let ratio be x.

Hence no. of coins be 5x ,9x , 4x respectively

Now given total amount = Rs.206

=> (.50)(5x) + (.25)(9x) + (.10)(4x) = 206

we get x = 40

=> No. of 50p coins = 200

=> No. of 25p coins = 360

=> No. of 10p coins = 160

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Filed Under: Ratios and Proportions

2032 232722

Q:

If the length of the diagonal of a square is 20cm,then its perimeter must be

a. $40 \sqrt{2}$ cm b. $30 \sqrt{2}$ cm c. 10cm d. 15 $\sqrt{2}$ cm

A) a	B) b
C) c	D) d

Answer & Explanation Answer: A) a

Explanation:

We know that d=√2s

Given diagonal = 20 cm

=> s = 20/ $\sqrt{2}$ cm

Therefore, perimeter of the square is 4s = 4 x 20/ $\sqrt{2}$ = 40 $\sqrt{2}$ cm.

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Filed Under: Area
Exam Prep: Bank Exams
Job Role: Bank PO

84 230322

Q:

25% of 25% Is Equal To

A) 0.0625	B) 0.0210
C) 0.03145	D) 0.3210

Answer & Explanation Answer: A) 0.0625

Explanation:

25% of 25% means

25/100 of 25/100

i.e, 1/4 of 1/4

or in other words 1/4 x 1/4=1/16

Hence, the answer is 1/16 = 0.0625.

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

76 215403

Quantitative Aptitude - Arithmetic Ability Questions

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