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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

The length of the radius of the circumference of a triangle having sides 9 cm, 12 cm and 15 cm is

A) 6 cm B) 7.5 cm
C) 4.5 cm D) 8 cm
 
Answer & Explanation Answer: B) 7.5 cm

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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:

Manik marks the price of his toys 40% above the cost price. If he allows 20% discount, then what is the profit or loss percentage?

A) 4% profit B) 12% profit  
C) 8% loss D) 12% loss
 
Answer & Explanation Answer: B) 12% profit  

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Q:

If tan2A - sin2A = x, then value of x is

A) tan2A sin2A B) cot2A cosec2A
C) tanA sinA D) cotA cosecA
 
Answer & Explanation Answer: A) tan2A sin2A

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Q:

A is thrice as productive as C. Together they can complete a job in 22.5 days. If B joins them after they have worked for 15 days then in how many days can they finish the rest of the job if B alone can do the job in 15 days?

A) 6 B) 3
C) 9 D) 2
 
Answer & Explanation Answer: B) 3

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Q:

cos3A is equal to

A) cos3A - 3sin2cosA B) cos3A + 4sin2cosA
C) cos3A + 3sin2cosA D) cos3A - 4sin2cosA
 
Answer & Explanation Answer: C) cos3A + 3sin2cosA

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Q:

If price of oranges is increased by 30%, then a person can buy 12 oranges less for Rs 208. What is the original price (in Rs) of an orange?

A) 2 B) 4
C) 8 D) 3
 
Answer & Explanation Answer: B) 4

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Q:

A bag contains 25 paise, 50 paise and 1 Rs coins. There are 220 coinsinall and the total amount in the bag is Rs. 160. If there arethrice as many 1 Rs. coins as there are 25 paise coins, then what is the number of 50 paise coins?

A) 60 B) 40
C) 120 D) 80
 
Answer & Explanation Answer: A) 60

Explanation:

Let there be x one rupee coin, y 50 paise coin, z 25 paise coinx + y + z = 220......(i)

Total amount = 160

Now, x + (y/2) + z = 160 ......(ii)

⇒4x + 2y + z = 640

Thrice as many 1 re coin as 25 paise

⇒x = 3z ......(iii)

On solving equation (i), (ii) and (iii), we get

z = 40x= 3* 40 = 120y = 220 –(120 + 40 ) = 60

So, 50 paise coin =60

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