Quantitative Aptitude - Arithmetic Ability Questions

Q:

3 brothers divided Rs. 1620 among them in such a way that the share of second is equal to 5/13 of share of other two, combined. What is the share of the second one?

A) Rs. 1170 B) Rs. 450
C) Rs. 540 D) Rs. 500
 
Answer & Explanation Answer: B) Rs. 450

Explanation:
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Q:

A student multiplied a number by 6/13 instead of 13/6. What is the percentage error in the calculation?

A) 369.44 percent B) 39.35 percent
C) 184.72 percent D) 78.7 percent
 
Answer & Explanation Answer: D) 78.7 percent

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Q:

A wholesaler sells a watch to a retailer at a profit of 25% and the retailer sells it to a customer at a loss of 12%. If the customer pays Rs 1045, what had it cost the wholesaler?

A) Rs 950 B) Rs 1149
C) Rs 1244 D) Rs 751
 
Answer & Explanation Answer: A) Rs 950

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Filed Under: Profit and Loss
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Q:

The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find two numbers.

A) 10 & 12 B) 10 & 18
C) 12 & -18 D) -12 & 18
 
Answer & Explanation Answer: D) -12 & 18

Explanation:

Given, difference of the squares of two numbers is 180.

k2 - l2 - 180

 

Also, square of the smaller number is 8 times the larger.

= l= 8k

 

Thus, k2 - 8a - 180 = 0

k2 – 18k + 10k - 180 = 0

→  k(k - 18) + 10(k – 18) = 0

= (k + 10)(k – 18) = 0

→  k = -10, 18

 

Thus, the other number is

324 - 180 = l2 

 

→ Numbers are 12, 18 or -12, 18.

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Q:

At present, the sum of ages of 4 people is 76. After 7 years, the ratio will be 7:6:5:8. Find out the present age of C?

A) 12 B) 11
C) 17 D) 13
 
Answer & Explanation Answer: D) 13

Explanation:

Ans.
Currently :
A+B+C+D = 76
According to ques , after 7 years
A+B+C+D = 7x+6x+5x+8x = 76+7*4
26x = 76 + 28
X = 104/26
x = 4
C’s present age = 5x – 7 =20 – 7
                                     = 13

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Q:

Choose the odd one out from among the given figures.

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

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Q:

The LCM of 16, 24, 36, 52 and 54 is?

A) 5618 B) 5216
C) 432 D) 5616
 
Answer & Explanation Answer: D) 5616

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Filed Under: HCF and LCM
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Q:

Raheem sells a machine for Rs 48 lakhs at a loss. Had he sold it for Rs 60 lakh, his gain would have been 5 times the former loss. Find the cost price of the machine.

A) Rs 58 lakhs B) Rs 69.6 lakhs
C) Rs 42 lakhs D) Rs 50 lakhs
 
Answer & Explanation Answer: D) Rs 50 lakhs

Explanation:
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