6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

If angles of measure (5y + 62°) and (22° + y) are supplementary , then value of y is

A) 16°	B) 32°
C) 8°	D) 1°

Answer & Explanation Answer: A) 16°

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 2100

Q:

If $\frac{a}{b + c} = \frac{b}{c + a} = \frac{C}{b + a}$ then which one of the following statements is correct?

A) Each fraction is equal to 1 or -1	B) Each fraction is equal to 1/2 or 1
C) Each fraction is equal to 1/2 or -1	D) Each fraction is equal to 1.2 only

Answer & Explanation Answer: C) Each fraction is equal to 1/2 or -1

Explanation:

a/(b+c) = b/(c+a) = c/(a+b)

Taking reciprocal and adding 1 to each ratio we get;

(b+c)/a + 1 = b/(c+a) + 1 = c/(a+b) + 1

Or (a+b+c)/a = (a+b+c)/b = (a+b+c)/c

So this can only be equal when a=b=c or a+b+c = 0

When a=b=c we get

a/(b+c)= ½When a+b+c = 0 we get

b+c = -a

So a/(b+c) = -1

So the ratios are ½ or -1

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Filed Under: Simplification
Exam Prep: Bank Exams

0 2099

Q:

If compound interest received on a certain amount in the 2nd year is Rs 1200, what will be the compound interest (in Rs) for the 4th year on the same amount at 10% rate of interest?

A) 1452	B) 1320
C) 1552	D) 1420

Answer & Explanation Answer: A) 1452

Explanation:

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Filed Under: Compound Interest
Exam Prep: Bank Exams

7 2099

Q:

A person crosses a 900 metres wide road in 120 seconds. What is his speed (in km/hr)?

A) 24	B) 21
C) 36	D) 27

Answer & Explanation Answer: B) 21

Explanation:

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Filed Under: Time and Distance
Exam Prep: Bank Exams , CAT

6 2098

Q:

PR is a tangent to a circle with centre O and radius 4 cm at point Q. If ∠POR = 90°, OR = 5 cm and OP = 20/3 cm, then the length of PR is:

A) 16/3 cm	B) 23/3 cm
C) 25/3 cm	D) 3 cm

Answer & Explanation Answer: C) 25/3 cm

Explanation:

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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: GATE , Bank Exams , AIEEE

8 2097

Q:

There are saplings of 361 mangoes tree and neem tree in a garden. The ratio of the number of mango tree to that of neem tree saplings are in the garden?

A) 209	B) 171
C) 57	D) 152

Answer & Explanation Answer: A) 209

Explanation:

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Filed Under: Ratios and Proportions

0 2097

Q:

Monthly salaries of Pia and Som are in the respective ratio of 5: 4. Pia, from her monthly salary, gives th to her mother. 15% towards her sister’s tuition fees, 18% towards a loan and she shops with the remaining amount which was Rs. 2,100. What is the monthly salary of Som ?

A) Rs.25,000	B) Rs.30,000
C) Rs.15,000	D) Rs.20,000

Answer & Explanation Answer:

Explanation:

Let monthly salary of Pia = Rs.500x => Monthly salary of Som = Rs.400x Amount given by Pia to her mother = 3/5 * 500x = 300x Amount for her sister tuition fees = 15*500x/100 = 75x Amount for loan = 18*500x/100 = 90x => Amount left = 500x −(300x +75x +90x) = 2100 => 500x - 465x = 35x = 2100 => x = 2100/35 = 60 Therefore, Som's salary = 400 x 60 = Rs. 24,000

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Filed Under: Ratios and Proportions

1 2097

Q:

A, B and C can do a job working alone in 50, 75 and 20 days respectively. They all work together for 4 days, then C quits. How many days will A and B take to finish the rest of the job?

A) 20	B) 30
C) 18	D) 24

Quantitative Aptitude - Arithmetic Ability Questions

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