6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

If Sin θ = 20/29, then what is the value of Cos θ?

A) 29/21	B) 21/29
C) 21/20	D) 20/29

Answer & Explanation Answer: B) 21/29

Explanation:

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Q:

A bag contains 25 paise, 50 paise and 1 Rs coins. There are 220 coinsinall and the total amount in the bag is Rs. 160. If there arethrice as many 1 Rs. coins as there are 25 paise coins, then what is the number of 50 paise coins?

A) 60	B) 40
C) 120	D) 80

Answer & Explanation Answer: A) 60

Explanation:

Let there be x one rupee coin, y 50 paise coin, z 25 paise coinx + y + z = 220......(i)

Total amount = 160

Now, x + (y/2) + z = 160 ......(ii)

⇒4x + 2y + z = 640

Thrice as many 1 re coin as 25 paise

⇒x = 3z ......(iii)

On solving equation (i), (ii) and (iii), we get

z = 40x= 3* 40 = 120y = 220 –(120 + 40 ) = 60

So, 50 paise coin =60

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Q:

A sum fetched a total simple interest of Rs. 9648 at the rate of 12% per year in 6 years. What is the sum?

A) Rs 16080	B) Rs 10720
C) Rs 8040	D) Rs 13400

Answer & Explanation Answer: D) Rs 13400

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Filed Under: Simple Interest
Exam Prep: Bank Exams

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Q:

If A, B and C together do a job in 4 days, A and C together do the job in 4.5 days and B and C together do the job in 12 days then in how many days can C alone do the job?

A) 36	B) 6
C) 18	D) 12

Answer & Explanation Answer: C) 18

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Filed Under: Time and Work
Exam Prep: Bank Exams

2 2203

Q:

A, B and C together can complete a work in 25 days. If the ratio of efficiency of A, B and C is 15 : 10 : 6 respectively, then in how many days C alone can complete the same work?

A) 727/6	B) 725/6
C) 775/6	D) 745/6

Answer & Explanation Answer: C) 775/6

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Exam Prep: Bank Exams , CAT

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Q:

A batsman scores 87 runs in the 21st match of his career. His average runs per match increases by 2. What was his average before the 21st match.

A) 45	B) 46
C) 44	D) 43

Answer & Explanation Answer: A) 45

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Filed Under: Average
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Q:

If a : b = c : d = 1 : 6, then what is the value of $\frac{a^{2} + c^{2}}{b^{2} + d^{2}}$ ?

A) 1/600	B) 1/60
C) 1/36	D) 1/360

Answer & Explanation Answer: C) 1/36

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Q:

PQRS is a square whose side is 20 cm. By joining opposite vertices of PQRS are get four triangles. What is the sum of the perimeters of the four triangles?

A) 40√2	B) 80√2 + 80
C) 40√2 + 40	D) 40√2 + 80

Quantitative Aptitude - Arithmetic Ability Questions

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