Quantitative Aptitude - Arithmetic Ability Questions

Q:

The average marks of 10 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 34 instead of 43. What is the correct average?

A) 25.5 B) 24.1
C) 24.5 D) 25.9
 
Answer & Explanation Answer: D) 25.9

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Filed Under: Average
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Q:

What will be the average of all the prime numbers before 19?

A) 8.28 B) 11.5
C) 5.34 D) 9.63
 
Answer & Explanation Answer: A) 8.28

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Q:

If ABCD is a trapezium, AC and BD are the diagonals intersecting each other at point O. Then AC : BD is

A) AB + AD : DC + BC B) AO - OC : OB - OD
C) AB : CD D) AD : BC
 
Answer & Explanation Answer: B) AO - OC : OB - OD

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Filed Under: Volume and Surface Area
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Q:

The base area of a right pyramid is 57 sq. units and height is 10 units. Then the volume of the pyramid is

A) 190 c. units B) 380 c. units
C) 540 c. units D) 570 c. units
 
Answer & Explanation Answer: A) 190 c. units

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Filed Under: Volume and Surface Area
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Q:

Number of circles that can be drawn through three non-colinear points is

A) exactly one B) two
C) three D) more than three
 
Answer & Explanation Answer: A) exactly one

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Q:

In a rhombus _____.

A) Diagonals are equal and perpendicular B) Consecutive angles are equal
C) Consecutive angles are supplementary D) Adjacent sides are not equal
 
Answer & Explanation Answer: C) Consecutive angles are supplementary

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Filed Under: Area
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Q:

The rate of discount on an article whose marked price is Rs. 170 and selling price is Rs. 130?

A) 24.26% B) 22.45%
C) 23.53% D) 23.60%
 
Answer & Explanation Answer: C) 23.53%

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Filed Under: Simplification
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Q:

What is the obtuse angle formed by the hands of a clock when the time in the clock is 2:30?

A) 95 deg B) 120 deg
C) 105 deg D) 165 deg
 
Answer & Explanation Answer: C) 105 deg

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Filed Under: Area
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