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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

Find the odd man out in the following number series?

71, 88, 113, 150, 203, 277

A) 277 B) 203
C) 150 D) 113
 
Answer & Explanation Answer: A) 277

Explanation:

The given number series is 

 

71      88       113       150       203          277

   +17    +25       +37      +53        +74

        +8      +12        +16       +21

            +4          +4         +5

 

The series should be  71  88  112   150    203   276 i.e, the differences of the difference should be +4.

 

Hence, the odd man in the given series is 277.

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Filed Under: Odd Man Out
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2 77267
Q:

Solve the following : 80÷[48−56−(60−36÷12×4)]=?

 

A) 5 B) 8
C) 4 D) 2
 
Answer & Explanation Answer: D) 2

Explanation:
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Filed Under: Simplification

2 77256
Q:

A man and his wife appear in an interview for two vacancies in the same post. The probability of husband's selection is (1/7) and the probability of wife's selection is (1/5). What is the probability that only one of them is selected ?

A) 2/7 B) 1/7
C) 3/4 D) 4/5
 
Answer & Explanation Answer: A) 2/7

Explanation:

Probability_35.jpg

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Filed Under: Probability

360 77246
Q:

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?

A) 70 kg B) 75 kg
C) 80 kg D) 85 kg
 
Answer & Explanation Answer: D) 85 kg

Explanation:

Total weight increased = (8 x 2.5) kg = 20 kg.

Weight of new person = (65 + 20) kg = 85 kg.

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Filed Under: Average

267 76543
Q:

A thief is noticed by a policeman from a distance of 200 m. The thief starts running and the policeman chases him. The thief and the policeman run at the rate of 10 km and 11 km per hour respectively. What is the distance between them after 6 minutes?

A) 100 m B) 150 m
C) 190 m D) 200 m
 
Answer & Explanation Answer: A) 100 m

Explanation:

Relative speed of the thief and policeman  =  (11 – 10) km/hr = 1 km/hr 

Distance covered in 6 minutes  = (1/60) x 6 km   = 1/10 km = 100 m

Therefore, Distance between the thief and policeman = (200 – 100) m = 100 m.

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Filed Under: Time and Distance

254 76401
Q:

Solve the following :

 

(-4){19 - (-2) x (-8)} = ?

A) 12 B) -140
C) 140 D) -12
 
Answer & Explanation Answer: D) -12

Explanation:
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Filed Under: Simplification
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0 76391
Q:

Simplify : 5x - 2x(x-1)

 

A) 3x-2 B) 3x+2
C) 7x+2x2 D) 7x-2x2
 
Answer & Explanation Answer: D) 7x-2x2

Explanation:
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Filed Under: Simplification
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0 76359
Q:

In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is :

A) 19 B) 29
C) 39 D) 49
 
Answer & Explanation Answer: C) 39

Explanation:

Let B's present age = x years. Then, A's present age = (x + 9) years.
(x + 9) + 10 = 2(x - 10)

 => x + 19 = 2x - 20

 => x =39.

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Filed Under: Problems on Ages

358 76225