Aptitude and Reasoning Questions

Q:

If a -­ b = 6 and ab =16, then a3 -­ b3 is

A) 504 B) 702
C) 728 D) 511
 
Answer & Explanation Answer: A) 504

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Q:

In a class of 56 students there are 28 girls. The average weight of these girls is 46 kg and average weight of the full class is 51 kgs. What is the average weight of the boys of the class?

A) 55 B) 56
C) 53 D) 54
 
Answer & Explanation Answer: B) 56

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Q:

­ If the selling price of an item is Rs 1150 after getting a discount of 8%, what is its marked price?

A) Rs 1250 B) Rs 1242
C) Rs 1058 D) Rs 1064
 
Answer & Explanation Answer: A) Rs 1250

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Q:

If x + y = 3, then what is the value of x3 + y3 + 9xy?

A) 15 B) 81
C) 27 D) 9
 
Answer & Explanation Answer: C) 27

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Q:

If tan4θ + tan2θ = 1 then the value of cos4θ + cos2θ is

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

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Q:

A can make a cupboard in 10 days and B can do it in 50 days. Along with C, they did the job in 6.25 days only. Then in how many days C alone can do the job?

A) 20 B) 25
C) 16 D) 15
 
Answer & Explanation Answer: B) 25

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Q:

B is thrice as efficient as A and C is 0.75 times as efficient as A. What is the ratio of number of days taken by A, B and C when they work individually?

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

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Q:

What is the value of ( 1/3 + cosec30)?

A) (√6+1)/√3 B) 7/3
C) (4+√3)/2 D) (√3+1)/2
 
Answer & Explanation Answer: B) 7/3

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