Quantitative Aptitude - Arithmetic Ability Questions

Q:

If cos -225° = x, then the value of x is

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

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Q:

What is the reflection of the point (4, 7) in the line y = -1?

A) (-6 , 7) B) (-4 , -9)
C) (4 , -9) D) (-6 , -7)
 
Answer & Explanation Answer: C) (4 , -9)

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Q:

If the difference between the roots of the equation Ax2  Bx + C = 0 is 4, then which of the following is TRUE?

A) B2 – 16A2 = 4AC + 4B2 B) B2 – 10A2 = 4AC + 6A2
C) B2 – 8A2 = 4AC + 10A2 D) B2 – 16A2 = 4AC + 8B2
 
Answer & Explanation Answer: B) B2 – 10A2 = 4AC + 6A2

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Q:

Δ XYZ is right angled at Y. If m∠Z = 60°, what is the length of YZ (in cm), if ZX = 3√3 cm?

A) 3√3/2 B) 3√3
C) 9 D) 6
 
Answer & Explanation Answer: A) 3√3/2

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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:

The average of 8 consecutive integers is 23/2. What is the average of first three integers?

A) 9 B) 19/2
C) 8 D) 10
 
Answer & Explanation Answer: A) 9

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Q:

The average revenues of 13 consecutive years of a company is Rs 78 lakhs. If the average of first 7 years is Rs 73 lakhs and that of last 7 years is Rs 85 lakhs, what is the revenue for the 7th year?

A) Rs 94 lakhs B) Rs 90 lakhs
C) Rs 88 lakhs D) Rs 92 lakhs
 
Answer & Explanation Answer: D) Rs 92 lakhs

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Q:

G is the centroid of the equilateral triangle ABC, if AB = 9cm then AG is equal to

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

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Filed Under: Volume and Surface Area
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