Quantitative Aptitude - Arithmetic Ability Questions

Q:

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 396, then what is the difference between the first and the third number?

A) 594 B) 448
C) 432 D) 453
 
Answer & Explanation Answer: C) 432

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Q:

The mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The 15th observation is

A) 20 B) 24
C) 26 D) 28
 
Answer & Explanation Answer: C) 26

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Q:

What is the value of tan150°?

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

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Q:

What is the value of cosecA/(cosec2A ­- 1)?

A) sinA B) secA
C) tanA D) cosA
 
Answer & Explanation Answer: B) secA

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Q:

Find the value of 532+108

A) 732 B) 1732
C) 2732 D) 3732
 
Answer & Explanation Answer: B) 1732

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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 area of quadrilateral ABCD?

A) 300 SQ.CM   B) 306 SQ.CM
C) 312 SQ.CM D) 316 SQ.CM
 
Answer & Explanation Answer: D) 316 SQ.CM

Explanation:
Area of quadrilateral ABCD = area of triangle ADC + area of triangle ABC
= 126 + ½ * 9 * 40 = 306
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Q:

If cos4θ-sin4θ=13 then the value of tan2θ is

A) 1/2 B) 1/3
C) 1/4 D) 1/5
 
Answer & Explanation Answer: A) 1/2

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Q:

ΔABC is right angled at B. If m∠A = 45 deg, then find the value of (tanC + √3/2).

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

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