6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

If $x = 8 + 2 \sqrt{15}$ , then what is the value of $\sqrt{x} + \frac{1}{\sqrt{x}}$ ?

A) 2√15	B) 3√5
C) (3√5+√3)/2	D) 3√2+3

Answer & Explanation Answer: C) (3√5+√3)/2

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

A, B and C start a business and the ratio of their investment is 8 : 5 : 3. If at the end the ratio of their profits is 4 : 15 : 6, then what is the ratio of time period of their investment?

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

Answer & Explanation Answer: C) 1 : 6 : 4

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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Q:

Srinivasan invests two equal amounts in two banks giving 8% and 12% rate of interest respectively. At the end of year the interest earned is Rs. 1500. Find the sum invested in each.

A) Rs. 5800	B) Rs. 15000
C) Rs. 7500	D) Rs. 17,000

Answer & Explanation Answer: C) Rs. 7500

Explanation:

Let the sum invested be x.
⇒ 8x/100 + 12x/100 = 1500
⇒ 20x = 150000
⇒ x = 7500

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Filed Under: Simple Interest
Exam Prep: Bank Exams

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Q:

If (1/cos θ) – (1/cot θ) = 1/P, then what is the value of cos θ?

A) (P + 1)/(P – 1)	B) (P2+ 1)/2P
C) 2(P2+ 1)/P	D) 2P/(P2+ 1)

Answer & Explanation Answer: D) 2P/(P2+ 1)

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

Ashok can row upstream at 8 kmph and downstream at 12kmph.What is the speed of the stream ?

A) 6 km/hr	B) 3 km/hr
C) 2 km/hr	D) 4.5 km/hr

Answer & Explanation Answer: C) 2 km/hr

Explanation:

If the speed downstream is a kmph and the speedup stream is b kmph then
Speed of the stream = 1/2 x (a–b) kmph
Speed downstream a = 12kmph
Speed upstream b = 8 kmph
Speed of the stream = 1/2 x (a–b) = 1/2 x (12–8)= 4/2 = 2 kmph

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Filed Under: Boats and Streams
Exam Prep: Bank Exams

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Q:

In an army selection process, the ratio of selected to unselected was 3:1. If 80 less had applied and 40 less selected, the ratio of selected to unselected would have been 4:1. How many candidates had applied for the process?

A) 480	B) 960
C) 240	D) 1440

Answer & Explanation Answer: A) 480

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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Q:

If a watch is being sold at Rs 7,225 which is marked at Rs 8,500, then what is the discount (in %) at which the watch is being sold?

A) 24	B) 15
C) 25	D) 20

Answer & Explanation Answer: B) 15

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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

Amar can complete a work in 30 days and Raman can complete the same work in 15 days. If both of them work together, then in 4 days what percent of the total work will be completed?

A) 15	B) 37
C) 40	D) 45

Quantitative Aptitude - Arithmetic Ability Questions

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