Quantitative Aptitude - Arithmetic Ability Questions

Q:

If xy = -30 and x2 + y2 = 61, then find the value of (x + y).

A) 2 B) 3
C) 1 D) 4
 
Answer & Explanation Answer: C) 1

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Filed Under: Simplification
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Q:

What is the simplified value of sin2(90θ)[sin(90θ)sinθ/tanθ]?

A) 1 B) cosec θ
C) 0 D) cos θ
 
Answer & Explanation Answer: C) 0

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Q:

What is the value of tan­ -240°?

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

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Q:

If 23x + 23y = 184, then what is the average of x and y?

A) 2 B) 4
C) 3 D) 2.5
 
Answer & Explanation Answer: B) 4

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Q:

The average of 12 numbers is 35. If four numbers 20, 27, 15 and 29 are removed then what will be the average of remaining numbers?

A) 41.125 B) 49.5
C) 52.5 D) 38.375
 
Answer & Explanation Answer: A) 41.125

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Filed Under: Average
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Q:

A  field  can  be  reaped  by  12  men  or  18  women  in  14  days.  In  how  many  days  can  8  men  and  16 women reap it?

A) 26 days B) 24 days
C) 9 days D) 8 days
 
Answer & Explanation Answer: C) 9 days

Explanation:
12 men or 18 women can complete in 14 days
8 men and 16 women can complete in how many days
12men = 18 women (Comparing efficiencies)
1men = 18/12 = 1.5 women
8 men and 16 women = 12women + 16 women = 28 women
18 women completes in 14 days
1 woman completes in 14*18 days
28 women completes in (14*18)/28 days = 9 days
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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

A's salary is 50% more than that of B. Then B's salary is less than that of A by

A) 50% B) 44%
C) 33 1/3% D) 46 1/2%
 
Answer & Explanation Answer: C) 33 1/3%

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Filed Under: Percentage
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Q:

The circumference of a circle is 88 cm, find its area?

A) 616 sq cm B) 308 sq cm
C) 154 sq cm D) 77 sq cm
 
Answer & Explanation Answer: A) 616 sq cm

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Filed Under: Area
Exam Prep: AIEEE , Bank Exams , CAT

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