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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

3cosA is equal to

A) 4cos3A + 3cosA B) 4cos3A - 3cosA
C) 3cos3A + 3cosA D) 3cos3A - 3cosA
 
Answer & Explanation Answer: B) 4cos3A - 3cosA

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Filed Under: Simplification
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Q:

In ΔPQR measure of angle Q is 90°. If tanP = 4/3, and PQ = 1.5cm, then what is the length (in cm) of side PR?

A) 2 B) 2.5
C) 3 D) 4.8
 
Answer & Explanation Answer: B) 2.5

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Filed Under: Simplification
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Q:

Select the odd number from the given alternatives.

A) 13 B) 17
C) 21 D) 23
 
Answer & Explanation Answer: C) 21

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

The average of ten numbers is 18. If one number is removed, then the average becomes 16, then what is the removed number?

 

A) 36 B) 40
C) 48 D) 52
 
Answer & Explanation Answer: A) 36

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Filed Under: Problems on Numbers
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Q:

The corners of a square of side ‘a’ are cut away so as to form a regular octagon. What is the side of the octagon?

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

Explanation:

Since we are forming a regular octagon

so AE = AL = FB = BG and so on

So AE = SB = x/√2

AE + EF + FB = side of square = a (Given)

So x/√2 + x + x/√2 = a

X = a/(√2+1) = a(√2 -1)

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Filed Under: Volume and Surface Area
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Q:

A natural number, when divided by 5,6,7 or 8,leaves a remainder of 4 in each case. what is the smallest of all such numbers?

 

 

A) 214 B) 424
C) 844 D) 1264
 
Answer & Explanation Answer: C) 844

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Filed Under: Alligation or Mixture
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Q:

The average temperature for Monday, Tuesday, Wednesday and Thursday was 48° . The average temperature for Tuesday, Wednesday, Thursday and Friday was 52°, If the temperature on Monday was 42°, then the temperature on Friday was (in degrees)

A) 58 B) 56
C) 52 D) 50
 
Answer & Explanation Answer: A) 58

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Filed Under: Average
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Q:

If cos 60° - sec 30° = x, then the value of x is

A) 1 B) (√3+√2)/2
C) (√3-4)/2√3 D) 1/√2
 
Answer & Explanation Answer: C) (√3-4)/2√3

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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

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