Quantitative Aptitude - Arithmetic Ability Questions

Q:

A trader had 1200 kgs of rice. He sold a part of it at 5% profit and the rest at 11% profit, so that he made a total profit of 7%. How much (in kg) wheat did he sell at 5% profit?

A) 900 B) 600
C) 400 D) 800
 
Answer & Explanation Answer: D) 800

Explanation:
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Q:

A rice trader buys 16 quintals of rice for Rs 5632. 20% rice is lost in transportation. At what rate should he sell to earn 25% profit?

A) Rs 225.2 per quintal B) Rs 550 per quintal
C) Rs 440 per quintal D) Rs 563.2 per quintal
 
Answer & Explanation Answer: B) Rs 550 per quintal

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Q:

Sum of cubes of first n even natural numbers.

Answer

Proof of Sum of cubes of first n even natural numbers ::


sum_of_cubes_of_first_n_even_natural_numbers1556603651.png image


 


Hence, in other words, the sum of the first n cubes is the square of the sum of the first n natural numbers.

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Q:

Mohit buys an old bicycle for Rs 2700 and spends Rs 500 on its repairs. If he sells the bicycle for Rs 3520, then what is his profit percentage?

A) 10 B) 12.5
C) 15 D) 20
 
Answer & Explanation Answer: A) 10

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Q:

Ravi sold a smartphone for Rs. 30,000. Had he offered a discount of 10% on the selling price(SP), he would have earned a profit of 35%. What is the cost price?

A) Rs. 20,000 B) Rs. 22,000
C) Rs. 24,000 D) Rs. 26,000
 
Answer & Explanation Answer: A) Rs. 20,000

Explanation:
30,000*90/100 = 27000
27,000 = CP*135*/100
CP = 20000
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Q:

If A : B = 2 : 5, B : C = 4 : 3 and C : D = 2 : 1, then what is value of A : C : D?

A) 6 : 5 : 2 B) 7 : 20 : 10
C) 8 : 30 : 15 D) 16 : 30 : 15
 
Answer & Explanation Answer: D) 16 : 30 : 15

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Q:

The selling price of 6 bananas is equal to the cost price of 8 bananas. Then the percentage of profit is

A) 20 B) 33 1/3
C) 25 D) 30
 
Answer & Explanation Answer: B) 33 1/3

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Q:

If xy = 22 and x2+ y2= 100, then what will be the value of (x + y)?

A) 12 B) 144
C) 72 D) 6
 
Answer & Explanation Answer: A) 12

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