Quantitative Aptitude - Arithmetic Ability Questions

Q:

The marked price of a ceiling fan is Rs. 1200 and the shopkeeper allows a discount of 5 % on it. Then selling price of the fan is

A) Rs. 1410 B) Rs. 1400
C) Rs. 1140 D) Rs. 1104
 
Answer & Explanation Answer: C) Rs. 1140

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Filed Under: Percentage
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Q:

The circumference of a circle is equal to the perimeter of an equilateral triangle. If the radius of the circle is 7 cm what is the length of the side of the equilateral triangle?

A) 22/3 cm B) 44/3 cm
C) 44 cm D) 22 cm
 
Answer & Explanation Answer: B) 44/3 cm

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Filed Under: Area
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Q:

If x - 1/x = 1 then what is the value of 1x1x-1-1x+1+1x2+1-1x2-1?

A) ±√5 B) 2/5
C) ±2/√5 D) ±√5/2
 
Answer & Explanation Answer: C) ±2/√5

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Filed Under: Simplification
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Q:

In the following question, select the odd word from the given alternatives.

A) Flower B) Fruit
C) Leaves D) Root
 
Answer & Explanation Answer: D) Root

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Filed Under: Odd Man Out
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Q:

Sita told her friend Gita " I am leaving today and will reach Mumbai tomorrow for my exams starting the day after tomorrow, which is Friday". What day is tomorrow in this conversation?

A) Wednesday B) Thursday
C) Tuesday D) Saturday
 
Answer & Explanation Answer: B) Thursday

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Filed Under: Calendar
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Q:

A spherical lead ball of radius 6 cm is melted and small lead balls of radius 3 mm are made. The total number of possible small lead balls is

A) 4250 B) 4000
C) 8005 D) 8000
 
Answer & Explanation Answer: D) 8000

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Q:

What is the fourth proportional to 72, 168 and 150?

A) 450 B) 300
C) 350 D) 400
 
Answer & Explanation Answer: C) 350

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Filed Under: Ratios and Proportions
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Q:

The sum of length, breadth and height of a cuboid is 22 cm and the length of its diagonal is 14 cm.
What is the surface area of the cuboid?

A) 288 sq.cm B) 216 sq.cm
C) 144 sq.cm D) Cannot be determined due to insufficient data
 
Answer & Explanation Answer: A) 288 sq.cm

Explanation:
Let lengths, breadth and height of cuboid be l, b and h respectively
According to question
l+b+h = 22cm......(i)
and
√(l^2+b^2+h^2) = 14cm .....(ii)
Surface area of cuboid = 2(lb+bh+lh)
Squaring eq (i) gives
l2+b2+h2+ 2(lb+bh+lh) = 484
Substituting l^2+b^2+h^2 from eq (i)
2(lb+bh+lh) = 484 -196 = 288 sq.cm
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Filed Under: Volume and Surface Area
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