Quantitative Aptitude - Arithmetic Ability Questions

Q:

If (6x ­- 1) -­ (8x -­ 5) = 7, then the value of x is _______ .

A) -3/2 B) 3/2
C) 11/2 D) -11/2
 
Answer & Explanation Answer: A) -3/2

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Q:

What will be the next set of numbers in the series? (2,3), (3,5), (5,7), (7,11), (11,13), ___

A) 13,15 B) 15,17
C) 13,17 D) 13,19
 
Answer & Explanation Answer: C) 13,17

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Q:

In an equilateral triangle ABC, G is the centroid. Each side of the triangle is 6 cm. The length of AG is

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

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Q:

If x = 313- 3-13, then 3x3 + 9x value is

A) 8 B) 9
C) 27 D) 16
 
Answer & Explanation Answer: A) 8

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Q:

If a + b + c = 9 and ab + bc + ca = 18, then what is the value of a3 + b3 + c3  3abc?

A) 189 B) 243
C) 361 D) 486
 
Answer & Explanation Answer: B) 243

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Q:

If 31% of an electricity bill is deducted, Rs 1794 is still to be paid. How much was the original bill amount?

A) Rs 1369 B) Rs 2600
C) Rs 2636 D) Rs 1405
 
Answer & Explanation Answer: B) Rs 2600

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Q:

Breadth of a rectangle is equal to the diagonal of the square whose side is 2.5√2 cm. Ratio between length and breadth of rectangle is 3 : 1. Find the area of the rectangle (in cm2).

A) 75 B) 90
C) 85 D) 80
 
Answer & Explanation Answer: A) 75

Explanation:

Diagonal of Square = Side √2= 2.5√2 × √2= 5 cm
Breadth = 5 cm
Length of rectangle = 5 × 3 = 15 cm
Area of rectangle = 15 × 5 = 75 cm2

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Q:

What is the measure of an interior angle of a regular Octagon?

A) 135° B) 120°
C) 140° D) 144°
 
Answer & Explanation Answer: A) 135°

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