Quantitative Aptitude - Arithmetic Ability Questions

Q:

Three numbers are in the ratio of 3:5:10 and their LCM is 630. Find their HCF.

A) 21 B) 42
C) 63 D) 36
 
Answer & Explanation Answer: A) 21

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Q:

Let O be the orthocentre of the triangle ABC. If ∠BOC = 150°, Then ∠BAC is

A) 30° B) 60°
C) 90° D) 120°
 
Answer & Explanation Answer: A) 30°

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Q:

If the parallel sides of a trapezium are 8 cm and 4 cm, M and N are the mid points of the diagonals of the trapezium, then length of MN is

A) 12 cm B) 6 cm
C) 1 cm D) 2 cm
 
Answer & Explanation Answer: D) 2 cm

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Q:

The area of a rhombus having one side 10 cm and one diagonal 12 cm is

A) 48 cm2 B) 96 cm2
C) 144 cm2 D) 192 cm2
 
Answer & Explanation Answer: B) 96 cm2

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Q:

In triangle ABC, AB = 8 cm, angle A is bisected internally to intersect BC at D. BD = 6 cm and DC = 7.5 cm. What is the length of CA?

A) 12 cm B) 10 cm
C) 12.5 cm D) 10.5 cm
 
Answer & Explanation Answer: B) 10 cm

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Q:

If x = 3+13, then the value of x-12642x-1x-233 is

A) √3/6 B) 2√3/6
C) 5/6 D) 2/3
 
Answer & Explanation Answer: C) 5/6

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Q:

If 14/3 + (1/2)(x - 7/3) = -2x/3, then the value of x is?

A) -3 B) 3
C) -6 D) 6
 
Answer & Explanation Answer: A) -3

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Q:

PQ is a tangent to the circle at T. If TR = TS where R and S are points on the circle and ∠RST = 65°, the ∠PTS =

A) 65° B) 130°
C) 115° D) 55°
 
Answer & Explanation Answer: C) 115°

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