6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

A sum of Rs.1550 was lent partly at 8% p.a. simple interest. The total interest received after 3 years was Rs.300. The ratio of the money lent at 5% to that lent at 8% is :

A) 5:8	B) 6:7
C) 16:15	D) 17:18

Answer & Explanation Answer: C) 16:15

Explanation:

let the sum lent at 5% be Rs.x and that lent at 8% be Rs.(1550-x). then,

Interest on x at 5% for 3 years + interest on (1550-x) at 8% for 3 years = 300

$\frac{x * 5 * 3}{100} + \frac{(1500 - x) * 8 * 3}{100} = 300$

x=800

Required ratio = x : (1550-x) = 800 : (1550-800) = 800 : 750 = 16 : 15

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Filed Under: Simple Interest
Exam Prep: Bank Exams
Job Role: Bank PO

71 35211

Q:

At what angle the hands of a clock are inclined at 15 minutes past 5?

A) 57.5 degrees	B) 67.5 degrees
C) 77.5 degrees	D) 87.5 degrees

Answer & Explanation Answer: B) 67.5 degrees

Explanation:

Angle traced by hour hand in $\frac{21}{4}$ 21 hrs = ${(\frac{360}{12} \times \frac{21}{4})}^{0}$ = $157 \frac{1^{0}}{2}$

Angle traced by min. hand in 15 min = ${(\frac{360}{12} \times 15)}^{0}$ = $90^{0}$

$\therefore$ Required Angle = ${(157 \frac{1}{2})}^{0} - 90^{0}$ = $67 \frac{1^{0}}{2}$

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

85 35206

Q:

If $(x + \frac{1}{x}) = 2,$ then find the value of $(x^{3} + \frac{1}{x^{3}}) \div (x^{18} + \frac{1}{x^{18}})$

A) 2/9	B) 5
C) 1	D) 1/9

Answer & Explanation Answer: C) 1

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 35204

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
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

1 35188

Q:

$\frac{1}{33} of \frac{1}{66} of \frac{1}{33} of \frac{1}{66}$ of 10000 of a number will be what percentage of that number?

A) 2.32	B) 1.32
C) 0.232	D) 0.0232

Answer & Explanation Answer: A) 2.32

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

16 35184

Q:

A man walking at the rate of 5 km/hr crosses a bridge in 15 minutes. The length of the bridge (in metres) is

A) 600	B) 750
C) 1000	D) 1250

Answer & Explanation Answer: D) 1250

Explanation:

speed = (5x5/18)m/sec
= 25/18 m/sec.

Distance covered in 15 minutes = (25/18 x 15 x 60)m
= 1250 m.

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Filed Under: Time and Distance

107 35177

Q:

$\frac{3}{5} + \frac{3}{7} = ?$

A) 935	B) 612
C) 1135	D) 635

Answer & Explanation Answer: C) 1135

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

1 35154

Q:

Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg.

A) 1:3	B) 2:3
C) 3:4	D) 4:5

Answer & Explanation Answer: B) 2:3

Explanation:

By the rule of alligation:
Cost of 1 kg rice of 1st kind Cost of 1 kg rice of 2nd kind

Quantitative Aptitude - Arithmetic Ability Questions

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