6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

FInd the odd man out of the given series of numbers?

120, 36, 6, 2, 1, 1

A) 120	B) 36
C) 6	D) 2

Answer & Explanation Answer: B) 36

Explanation:

The given number series is 120, 36, 6, 2, 1, 1

120

120/5 = 24 (not 36)

24/4 = 6

6/3 = 2

2/2 = 1

1/1 = 1

Hence, the odd man in the given number series is 24.

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Filed Under: Odd Man Out
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1 69899

Q:

Find the odd man out?

3, 12, 39, 120, 364

A) 364	B) 120
C) 39	D) 3

Answer & Explanation Answer: A) 364

Explanation:

The given number series is 3, 12, 39, 120, 364

$3 3 + 3^{2} = 3 + 9 = 12 12 + 3^{3} = 12 + 27 = 39 39 + 3^{4} = 39 + 81 = 120 120 + 3^{5} = 120 + 243 = 363 (Not 364)$

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Filed Under: Odd Man Out
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7 69722

Q:

Question :

What is the sum which earned interest ?

Statements :

a. The total simple interest was Rs. 9000 after 9 years.
b. The total of sum and simple interest was double of the sum after 6 years.

A) Only a is sufficient	B) Neither a nor b is sufficient
C) Only b is sufficient	D) Both a and b sufficient

Answer & Explanation Answer: D) Both a and b sufficient

Explanation:

Let the sum be Rs. x

a. gives, S.I = Rs. 9000 and time = 9 years.

b. gives, Sum + S.I for 6 years = 2 x Sum

--> Sum = S.I for 6 years.

Now, S.I for 9 years = Rs. 9000

S.I for 1 year = Rs. 9000/9 = Rs. 1000.

S.I for 6 years = Rs. (1000 x 6)= Rs. 6000.

--> x = Rs. 6000

Thus, both a and b are necessary to answer the question.

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Filed Under: Simple Interest
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8 69619

Q:

The average of two numbers is 10 and the product of two numbers is 96. Find the two numbers.

A) 3, 32	B) 12, 8
C) 1, 96	D) 24, 4

Answer & Explanation Answer: B) 12, 8

Explanation:

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Filed Under: Average
Exam Prep: Bank Exams

3 69619

Q:

If the diameter of a circle is 28 cm, then what will be its circumference (in cm)?

A) 88	B) 176
C) 35	D) 70

Answer & Explanation Answer: A) 88

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

0 69264

Q:

A began a business with Rs. 85,000. He was joined afterwards by B with Ks. 42,500. For how much period does B join, if the profits at the end of the year are divided in the ratio of 3 : 1 ?

A) 4 months	B) 5 months
C) 6 months	D) 8 months

Answer & Explanation Answer: D) 8 months

Explanation:

Suppose B joined for x months . Then, ( 85000 * 12 )/(42500 * x) = 3. or x = (85000 * 12) / (42500 * 3) = 8.

So, B joined for 8 months.

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Filed Under: Partnership

97 69239

Q:

An air conditioner can cool the hall in 40 miutes while another takes 45 minutes to cool under similar conditions. If both air conditioners are switched on at same instance then how long will it take to cool the room approximately ?

A) 18 minutes	B) 19 minutes
C) 22 minutes	D) 24 minutes

Answer & Explanation Answer: C) 22 minutes

Explanation:

Let the two conditioners be A and B

'A' cools at 40min

'B' at 45min

Together = (a x b)/(a + b)

= (45 x 40)/(45 + 40)

= 45 x 40/85

= 21.1764

= 22 min (approx).

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Filed Under: Time and Work
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94 69181

Q:

Simplify: (157 x 157 + 143 x 143)

A) 45098	B) 46098
C) 90196	D) 91196

Quantitative Aptitude - Arithmetic Ability Questions

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