Quantitative Aptitude - Arithmetic Ability Questions

Q:

10 is added to a certain number, the sum is multiplied by 7, the product is divided by 5 and 5 is subtracted from the quotient. The remainder left is half of 88. What is the number?

A) 21 B) 20
C) 25 D) 30
 
Answer & Explanation Answer: C) 25

Explanation:

Let the number be x

When 10 is added, number = x + 10

When 7 is multiplied, number = 7 X (x + 10)

According to question,

⇒[7 X (x+10) / 5] –5 = 44

⇒7x + 70 = 49 X 5

⇒x + 10 = 35,

⇒x = 25

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Q:

What is the area (in sq cm) of a rectangle of perimeter 48 cm and breadth 10 cm?

A) 140 B) 480
C) 240 D) 440
 
Answer & Explanation Answer: A) 140

Explanation:
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Q:

Area of 4 walls of a cuboid 400 sq cm, its length is 15 cm and height is 8 cm. What is its breadth (in cm)?

A) 12 B) 20
C) 24 D) 10
 
Answer & Explanation Answer: D) 10

Explanation:
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Q:

The area of a right angled triangle ABC, right angled at B, is 46 sq units. A median is drawn from A to BC which intersects at D. Find the area (in sq. units)of triangle ABD.

A) 12 B) 23
C) 46 D) 88
 
Answer & Explanation Answer: B) 23

Explanation:
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Q:

If a = √2 + 1 and b = √2 - 1, then the value of 1a+1+1b+1 will be

A) 0 B) 1
C) 2 D) -1
 
Answer & Explanation Answer: B) 1

Explanation:
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Filed Under: Simplification
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Q:

If the three numbers in the ratio 3:2:5 be such that the sum of the squares is equal to 1862 then which number is the middle one.

A) 16 B) 14
C) 13 D) 15
 
Answer & Explanation Answer: B) 14

Explanation:
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Filed Under: Ratios and Proportions
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Q:

The area of a semicircle is 308 sq.cm. Calculate its perimeter (in cm)

A) 144 B) 49
C) 98 D) 72
 
Answer & Explanation Answer: D) 72

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Q:

Both A and B together can complete a work in 20 days and B alone can complete the same work in 36 days. In how many days will A alone complete the work?

A) 30 B) 50
C) 45 D) 42
 
Answer & Explanation Answer: C) 45

Explanation:
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Filed Under: Time and Work
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