6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Sum of three consecutive integers is 51 . The middle one is:

A) 14	B) 15
C) 16	D) 17

Answer & Explanation Answer: D) 17

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Q:

If 5(4-x) - 4 < 3x - 2 > 4x - 6; then the value of x is

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

Answer & Explanation Answer: A) 3

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Filed Under: Simplification
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Q:

If price of the table is increased by 25%, then a person can buy 25 table less for Rs 25000. What is the original price (in Rs) of the table?

A) 225	B) 250
C) 200	D) 167

Answer & Explanation Answer: C) 200

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Filed Under: Percentage
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Q:

A book is sold at three successive discounts of 20%, 20% and 10%. What is the net discount (in percentage)?

A) 42.4	B) 48.6
C) 44.2	D) 40.4

Answer & Explanation Answer: A) 42.4

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Q:

If $a^{2} + b^{2} + c^{2} = 14$ and $a + b + c = 6$ , then the value of $(a b + b c + c a)$ is,

A) 11	B) 12
C) 13	D) 14

Answer & Explanation Answer: A) 11

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Q:

A boat travels 24 km upstream in 6 h and 20 km downstream in 4 h. then, the speed of a boat in still water and the speed of current are respectively

A) 4.5 km/h and 3 km/h	B) 4.5 km/h and 0.5 km/h
C) 4 km/h and 2 km/h 5 km/h and 2 km/h	D) 5 km/h and 2 km/h

Answer & Explanation Answer: B) 4.5 km/h and 0.5 km/h

Explanation:

Distance travelled by boat in upstream=24km

Time taken = 6 h

Speed of the boat in upstream = 24/6 = 4 km/h

And distance travelled by boat in downstream = 20 km

Time taken = 4h Speed of the boat in downstream = 20/4 km/h = 5 km/h

Now, speed of the boat in still water = 1/2 [ speed of the boat in upstream + speed of the boat in downstream] =1/2 [4 + 5] = 1/2 × 9 = 4.5 km/h

And speed of the current = 1⁄2 [speed of the boat in downstream – speed of the boat in upstream] = 1/2 [5 – 4] = 1/2 × 1 = 0.5 km/h

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Filed Under: Boats and Streams
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Q:

If $x^{2} + y^{2} + z^{2} = xy + yz + zx$ , then what is the value of (7x + 3y – 5z)/5x?

A) 0	B) 1
C) 5	D) 33/5

Answer & Explanation Answer: B) 1

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Q:

When a number is increased by 28, it becomes 107% of itself. What is the number?

A) 336	B) 420
C) 400	D) 252

Quantitative Aptitude - Arithmetic Ability Questions

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