Quantitative Aptitude - Arithmetic Ability Questions

Q:

If θ>0, be an acute angle, then the value of it in degrees satisfying cos2θ-3cosθ+2sin2θ=1 is

A) 90° B) 30°
C) 45° D) 60°
 
Answer & Explanation Answer: D) 60°

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Q:

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

A) 82 B) 75
C) 64 D) 31
 
Answer & Explanation Answer: C) 64

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Q:

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

A) 2714 B) 8432
C) 6742 D) 7858
 
Answer & Explanation Answer: D) 7858

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Q:

If ax + by = 1 and bx + ay  = 2aba2+b2 then x2+y2a2+b2 is equal to

A) 1 B) 2
C) 0.5 D) 0
 
Answer & Explanation Answer: A) 1

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Q:

What is the value of √[(1 ­- cosA)/(1 + cosA)]?

A) cosecA ­- cotA B) cosecA + cotA
C) secA -­ cotA D) secA + cotA
 
Answer & Explanation Answer: A) cosecA ­- cotA

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Q:

Find  two  natural  numbers  whose  sum  is  85 andtheleast common multiple is 102.

A) 30 & 55 B) 17 & 68
C) 35& 55 D) 51 & 34
 
Answer & Explanation Answer: D) 51 & 34

Explanation:

Let a + b = 85→b = 85 –a

LCM(a,b) =102→ab = 102

k→a(85 –a) = 102k, where k is a natural number.

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Q:

If 3√2 + √18 + √50 = 15.55, then what is the value of √32 + √72?

A) 13.22 B) 10.83
C) 14.13 D) 16.54
 
Answer & Explanation Answer: C) 14.13

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Q:

What is the simplified value of (sin A – cosec A)(sec A – cos A) (tan A + cot A)?

A) 1 B) -1
C) 0 D) 2
 
Answer & Explanation Answer: B) -1

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