Quantitative Aptitude - Arithmetic Ability Questions

Q:

If 35% of A's income is equal to 25% of B's income, then the ratio of A's income to B's income is

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

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Filed Under: Percentage
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Q:

If xy = 48 and x2 + y2 = 100, then (x + y) is

A) 12 B) 16
C) 18 D) 14
 
Answer & Explanation Answer: D) 14

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Filed Under: Simplification
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Q:

If Cosec θ = 17/8, then what is the value of Cos θ?

A) 15/8 B) 15/17
C) 8/15 D) 17/15
 
Answer & Explanation Answer: B) 15/17

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Q:

A shopkeeper, sold cocoa seeds at the rate Rs 1330 a kg and bears a loss of 15%. Now if he decides to sell it at Rs 1463 per kg, what will be the result?

A) 13 percent loss B) 6.5 percent gain
C) 6.5 percent loss D) 13 percent gain
 
Answer & Explanation Answer: C) 6.5 percent loss

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Filed Under: Profit and Loss
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Q:

A train, starting from rest, attains a velocity of 90 kmph in 5 minutes. Assuming that the acceration is uniform, the distance travelled by the train during this time is

A) 1.5 km B) 2.25 km
C) 3.75 km D) 3.25 km
 
Answer & Explanation Answer: C) 3.75 km

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Filed Under: Problems on Trains
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Q:

In a class of 100 students, the average weight is 30 kg. If the average weight of the girls is 24 kg and that of the boys is 32 kg, then what is the number of girls in the class?

A) 25 B) 26
C) 27 D) 28
 
Answer & Explanation Answer: A) 25

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Filed Under: Average
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Q:

A box contains 5 green, 4 yellow and 3 white marbles. Threemarbles are drawn at random. What is the probability thatthey are not of the same colour ?

A) 40/44 B) 44/41
C) 41/44 D) 40/39
 
Answer & Explanation Answer: C) 41/44

Explanation:

n(E) = 5C3 + 4C3 + 3C3 = 10 + 4 + 1 = 15n(S) = 12C3 = 220

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Filed Under: Permutations and Combinations
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Q:

8 men can complete a work in 16 days. 16 women can complete the same work in 24 days. In how many days can 4 men and 8 women complete the same work?

A) B)
C) D)
 
Answer & Explanation Answer:

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Filed Under: Time and Work
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