Quantitative Aptitude - Arithmetic Ability Questions

Q:

If a + b = 10 and ab = 24, then the value of a3 + b3 is

A) 280 B) 370
C) 520 D) 730
 
Answer & Explanation Answer: A) 280

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Q:

In the following question, select the odd number from the given alternatives.

A) 145 B) 463
C) 581 D) 651
 
Answer & Explanation Answer: B) 463

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Q:

46% of 250 is equal to

A) 115 B) 92
C) 112 D) 13.5
 
Answer & Explanation Answer: A) 115

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Filed Under: Percentage
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Q:

The radii of two concentric circles are 68 cm and 22 cm. The area of the closed figure bounded by the boundaries of the circles is

A) 4140π sq.cm. B) 4110π sq.cm.
C) 4080π sq.cm. D) 4050π sq.cm.
 
Answer & Explanation Answer: A) 4140π sq.cm.

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Q:

Given that the polynomial (x2+ ax+ b) leaves that same remainder when by (x –1) or (x + 1) What are the values of a and b respectively?

A) 4 and 0 B) 0 and 3
C) 3 and 0 D)  0 and any interger
 
Answer & Explanation Answer: D)  0 and any interger

Explanation:

Since x^2+ ax + b when divided by x-1 or x+1 leaves the same remainder

So on putting x=1 and x=-1 we get the same value

1+a+b = 1-a+b

2a=0

a=0

here b can take any value as it will always get cancelled out

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Q:

The compound interest earned in two years at 12% per annum is Rs 10176. What is the sum (in Rs) invested?

A) 50000 B) 60000
C) 40000 D) 80000
 
Answer & Explanation Answer: C) 40000

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Filed Under: Compound Interest
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Q:

Find the odd word/letters/number from the given alternatives.

A) Throat B) Eye
C) Ear D) Skin
 
Answer & Explanation Answer: A) Throat

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Q:

The area of a right angled triangle ABC, right angled at B, is 46 sq units. A median is drawn from A to BC which intersects at D. Find the area (in sq. units)of triangle ABD.

A) 12 B) 23
C) 46 D) 88
 
Answer & Explanation Answer: B) 23

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Filed Under: Area
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