Profit and Loss - General Aptitude

Q1:

Some articles were bought at 6 articles for Rs. 5 and sold at 5 articles for Rs. 6. Gain percent is:

A 30%

B
33 1 %
3

C 35%

D 44%

ANS:D - 44%

Suppose, number of articles bought = L.C.M. of 6 and 5 = 30.

C.P. of 30 articles = Rs. 5 x 30 = Rs. 25.
6
S.P. of 30 articles = Rs. 6 x 30 = Rs. 36.
5
 Gain % = 11 x 100 % = 44%.
25