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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

Average age of 5 students of a school is 14 years. The average age of students and their Mathematics and science teachers is 30 years. If the age of science teacher is 6 years more than the age of Mathematics teacher, then what is the age (in years) of Mathematics teacher?

 

 

A) 67   B) 68  
C) 56   D) 74
 
Answer & Explanation Answer: A) 67  

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Filed Under: Problems on Ages
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Q:

In a rhombus _____.

A) opposite angles are supplementary B) diagonals form two congruent triangles
C) diagonals are congruent D) diagonals do not bisect opposite angles
 
Answer & Explanation Answer: B) diagonals form two congruent triangles

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Filed Under: Area
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Q:

If A + B = 90 deg and Cos B = 1/3, then the value of Sin A is

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

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Filed Under: Simplification
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Q:

Which of the following is correct?

A) (3x + 4y)(4x -­ 3y) = 12x2 + 7xy ­- 12y2 B) (3x + 4y)(4x -­ 3y) = 12x2  + 251xy -­ 12y2
C) (3x + 4y)(4x -­ 3y) = 12x2 -­ 7xy + 12y2 D) (3x + 4y)(4x -­ 3y) = 12x2 - ­ 251xy + 12y2
 
Answer & Explanation Answer: A) (3x + 4y)(4x -­ 3y) = 12x2 + 7xy ­- 12y2

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Q:

ΔABC is a right angled triangle, the radius of its circumcircle is 3 cm and the length of its altitude drawn from the opposite vertex to the hypotenuse is 2 cm. Then the area of the triangle is

A) 12 sq cm B) 3 sq cm
C) 6 sq cm D) 5 sq cm
 
Answer & Explanation Answer: C) 6 sq cm

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Filed Under: Quantitative Aptitude - Arithmetic Ability
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Q:

'P' is the smallest positive integer such that every positive integer N greater than 'P' can be written as a sum of two composite numbers. Then 'P' is

A) 10 B) 3
C) 11 D) 6
 
Answer & Explanation Answer: C) 11

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Filed Under: Problems on Numbers
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Q:

If the edge of a cube is increased by 2 cm, the volume will increase by 488 cub.cm. What then will be the length of each edge of the cube?

A) 6 cm B) 8 cm
C) 9 cm D) 7 cm
 
Answer & Explanation Answer: B) 8 cm

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Filed Under: Volume and Surface Area
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Q:

The two lines 4x+3y=0 and 7x+5y=0 will ______ in their graphical representation.

A) be parallel to each other B) intersect each other at one point only
C) intersect each other at three points only D) coincide each other
 
Answer & Explanation Answer: B) intersect each other at one point only

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