Aptitude - Question 5

+3 votes
The product of two numbers is 40 and the sum of their squares is 89. The difference of the number is:

(A) 5 
(B) 4
(C) 6 
(D) 3
asked May 10, 2019 in Aptitude by getgatebook (34,850 points)
reshown May 11, 2019 by getgatebook

1 Answer

+3 votes
 
Best answer

(a-b)^2 = (a^2 +b^2) - 2*(a*b)

(a-b)^2 = 89 - 2*40

(a-b)^2 = 89 - 80 = 9

So, (a-b) = 3

Ans.: 3

answered May 11, 2019 by (7,030 points)
selected May 11, 2019 by getgatebook
Answer:
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