Quantitative Aptitude - Arithmetic Ability Questions

Q:

Select the odd word/letters/number/number pair from the given alternatives.

A) E5T B) O9S
C) U3A D) I7M
 
Answer & Explanation Answer: C) U3A

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

The mean of 100 observations was calculated as 40. It was found later on that one of the observations was misread as 83 instead of 53. The correct mean is:

A) 39 B) 39.7
C) 40.3 D) 42.7
 
Answer & Explanation Answer: B) 39.7

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Q:

5 hrs after a goods train passed a station, another train travelling at a speed of 70 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 9 hours. What is the speed of the goods train?

A) 45 km/hr B) 54 km/hr
C) 67.5 km/hr D) 36 km/hr
 
Answer & Explanation Answer: A) 45 km/hr

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Filed Under: Problems on Trains
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Q:

Ratio of present ages of P and Q is 9 : 4. The difference between their ages is 20 years. What will be the sum (in years) of their ages after 10 years?

A) 62 B) 66
C) 72 D) 76
 
Answer & Explanation Answer: C) 72

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Filed Under: Problems on Ages
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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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Q:

Mahesh buys 3 shirts at an average price of Rs 1250. If he buys 2 more shirts at an average price of Rs 1450 what will be the average price (in Rs) of all the 5 shirts he buys?

A) 1370 B) 1330
C) 1310 D) 1390
 
Answer & Explanation Answer: B) 1330

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Q:

If [7(5x/3 - 3/2)]/2 + 3/2 = 1/4, then what is the value of x?

A) 35/24 B) 24/35
C) -24/35 D) -35/24
 
Answer & Explanation Answer: B) 24/35

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Filed Under: Simplification
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Q:

When x2+ax+b is divided by (x-1), the remainder is 15 and when x2+bx+a is divided by (x+1), the remainder is -1, then the value of a2+b2 is

A) 10 B) 20
C) 8 D) 16
 
Answer & Explanation Answer: A) 10

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