1.  Some articles were bought at 6 articles for ₹ 5 and sold at 5 articles for ₹ 6. Gain percent is:
A. 30%
B. 33.33%
C. 35%
D. 44%

Answer: Option D

Explanation:

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

C.P. of 30 articles = ₹ 5 x 30 = ₹ 25.
6

S.P. of 30 articles = ₹ 6 x 30 = ₹ 36.
5

Gain % = 11 x 100 % = 44%.
25