6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the mean to be 12. What should be the number in place of x ?

A) 6	B) 7
C) 8	D) 9

Answer & Explanation Answer: B) 7

Explanation:

Clearly, we have (3 + 11 + 7 + 9 + 15 + 13 + 8 + 19 + 17 + 21 + 14 + x) / 12 = 12.

or 137 + x = 144 or x = 144 - 137 = 7.

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Filed Under: Average

37 30621

Q:

Refer the below data table and answer the following question.

What was the total profit or loss of the company in the last 5 years?

A) Loss of Rs 45 crores	B) Profit of Rs 55 crores
C) Profit of Rs 45 crores	D) Loss of Rs 55 crores

Answer & Explanation Answer: C) Profit of Rs 45 crores

Explanation:

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

0 30619

Q:

125 over 1000 in Simplest Form?

A) 2/9	B) 1/8
C) 3/8	D) 4/7

Answer & Explanation Answer: B) 1/8

Explanation:

125 over 1000 in Simplest Form means $\frac{125}{1000}$ in its simple fraction form.

Now, to get the simplest form of 125/1000, find the HCF or GCD of both numerator and denominator i.e, 125 and 1000.

HCF of 125, 1000 = 125

Then, divide both numerator and denominator by 125

i.e, $\frac{\frac{125}{125}}{\frac{1000}{125}} = \frac{1}{8}$

Hence, $\frac{1}{8}$ is the simplest form of 125 over 1000.

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Filed Under: Decimal Fractions
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO , IT Trainer

50 30513

Q:

The smallest number which when diminished by 7, is divisible by 12, 16, 18, 21 and 28 is

A) 1008	B) 1015
C) 1022	D) 1032

Answer & Explanation Answer: B) 1015

Explanation:

Required Number = (L.C.M of 12, 16, 18,21,28)+7

= 1008 + 7

= 1015

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Filed Under: HCF and LCM

101 30466

Q:

The average age of a group of 10 students is 15 years. When 5 more students join the group, the average age increase by 1 year. The average age of the new students is?

Answer

Total age of 10 students = 150 years

Total age of 15 students = 240 years

Total age of 5 new students = 240 - 150 = 90 years

$\inline \therefore$ Average age of 5 new students = $\frac{90}{5}$ = 18 years

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Subject: Problems on Ages

153 30462

Q:

In the following question, select the odd word pair from the given alternatives.

A) Trouser – Garment	B) Ostrich – Bird
C) Table – Furniture	D) Stationery – Pen

Answer & Explanation Answer: D) Stationery – Pen

Explanation:

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

0 30418

Q:

In a scheme, a pack of three soaps with MRP Rs.45 is available for Rs.42. If it still gives a profit of 5% to the shopkeeper, then the cost price of the pack is ?

A) 38	B) 39
C) 40	D) 41

Answer & Explanation Answer: C) 40

Explanation:

Given M.P=45,S.P=42, Profit = 0.05

Let C.P=x , Then

Profit = (42-x)/x = 0.05
=> x = 40.

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

57 30378

Q:

x = y - (50/y), where x and y are both > 0

If the value of y is doubled in the equation above, the value of x will

A) decrease	B) stay the same
C) increase four fold	D) increase to more than double

Answer & Explanation Answer: D) increase to more than double

Explanation:

The best approach is to pick a number that satisfies the rules that x and y are greater than 0. So for example you could choose 25 for y.

Quantitative Aptitude - Arithmetic Ability Questions

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