Quantitative Aptitude - Arithmetic Ability Questions

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 number of solutions of the pair of linear equations x + 2y - 8 = 0 and 2x + 4y = 16 is

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

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Q:

Which of the following numbers is not a prime number?

A) 197 B) 313
C) 439 D) 391
 
Answer & Explanation Answer: D) 391

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Q:

If r sinθ=3 and r cosθ=1, then the values of r and θ are: (0°θ90°)

A) r=1, θ=30° B) r=1⁄2, θ=30°
C) r=3 , θ=30° D) r=2, θ=60°
 
Answer & Explanation Answer: D) r=2, θ=60°

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Q:

If  x=2+32-3, then what is the value of x+1/x ?

A) 14 B) 8
C) 0 D) 1
 
Answer & Explanation Answer: A) 14

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Q:

ABCD is a quadrilateral with AB = 9 cm, BC = 40 cm, CD = 28 cm, DA = 15 cm and angle ABC is a right –angel
What is the difference between perimeter of triangle ABC and perimeter of triangle ADC?

A) 4 cm B) 5 cm
C) 6 cm D) 7 cm
 
Answer & Explanation Answer: C) 6 cm

Explanation:
Perimeter of triangle ABC – Perimeter of triangle ADC = (9+40+41) - (15+28+41) = 6 cm
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Q:

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

 

A) (9, 18, 25) B) (7, 16, 23)
C) (26, 35, 42) D) (19, 27, 35)
 
Answer & Explanation Answer: D) (19, 27, 35)

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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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