Quantitative Aptitude - Arithmetic Ability Questions

Q:

The average of 17 results is 60. If the average of first 9 results is 57 and that of the last 9 results is 65, then what will be the value of 9th result?

A) 39 B) 78
C) 117 D) 156
 
Answer & Explanation Answer: B) 78

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Q:

One of four words is a class to which the other three belong. Identify the class.

A) Hawaii B) Cuba
C) Island D) Greenland
 
Answer & Explanation Answer: C) Island

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Q:

If x - 2y = 2 and 3x + y = 20, then the value of (x,y) is

A) (6, 2) B) (4, 1)
C) (3, 2) D) (5, 5)
 
Answer & Explanation Answer: A) (6, 2)

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Q:

If Cot θ = 21/20, then what is the value of Cosec θ?

A) 21/29 B) 29/21
C) 20/29 D) 29/20
 
Answer & Explanation Answer: D) 29/20

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Q:

Δ ABC is right angled at B. If m∠A = 60°, then what is the value of 2 Sec C x 1/2 Sin A?

A) 1/2 B) 1/3
C) 1 D) 1/√2
 
Answer & Explanation Answer: C) 1

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Q:

199994 x 200006 = ?

A) 39999799964 B) 39999999864
C) 39999999954 D) 39999999964
 
Answer & Explanation Answer: D) 39999999964

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Q:

Find the value of 27a3 + 1a3, if 9a2 + 1a2 = 43

A) 240 B) 280
C) 320 D) 360
 
Answer & Explanation Answer: B) 280

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Q:

The length of the base of an isosceles triangle is 2x­2y+4z, and its perimeter is 4x­2y+6z. Then the length of each of the equal sides is

A) x+y B) x+y+z
C) 2(x+y) D) x+z
 
Answer & Explanation Answer: D) x+z

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