Quantitative Aptitude - Arithmetic Ability Questions

Q:

Which of the following is correct?

A) (3x + 4y)(4x -­ 3y) = 12x2 + 7xy ­- 12y2 B) (3x + 4y)(4x -­ 3y) = 12x2  + 251xy -­ 12y2
C) (3x + 4y)(4x -­ 3y) = 12x2 -­ 7xy + 12y2 D) (3x + 4y)(4x -­ 3y) = 12x2 - ­ 251xy + 12y2
 
Answer & Explanation Answer: A) (3x + 4y)(4x -­ 3y) = 12x2 + 7xy ­- 12y2

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Q:

ΔABC is right angled at B. If cotA = 7/24, then what is the value of cosecC ?

A) 7/25 B) 25/7
C) 24/7 D) 7/24
 
Answer & Explanation Answer: B) 25/7

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Q:

ΔPQR is right angled at Q. If m∠P = 45°, then find the value of (cosecR + 1/3).

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

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Q:

If the standard deviation of a population is 6.5, what would be the population variance?

A) 40.25 B) 42.25
C) 18.25 D) 13
 
Answer & Explanation Answer: B) 42.25

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Q:

Select the odd word/letters/number/number pair from the given alternatives.

A) 42 B) 24
C) 27 D) 43
 
Answer & Explanation Answer: D) 43

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Q:

A right-angled triangle ABC is right-angled at B, and tan A = 4/3. If AC = 25 cm, the length of BC is

A) 33.3 cm B) 24 cm
C) 20 cm D) 18.75 cm
 
Answer & Explanation Answer: C) 20 cm

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Q:

What is the distance between the points (4,­-8) and (­-2,0)?

A) 100 units B) 5 units
C) 25 units D) 10 units
 
Answer & Explanation Answer: D) 10 units

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Q:

Select the odd word/letters/number/number pair from the given alternatives.

A) AI B) OU
C) AD D) IO
 
Answer & Explanation Answer: C) AD

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