1.  Which of the following are in descending order of their value ?
A. 1/3 , 2/5 , 3/7 , 4/5 , 5/6 , 6/7
B. 1/3 , 2/5 , 3/5 , 4/7 , 5/6 , 6/7
C. 1/3 , 2/5 , 3/5 , 5/6 , 4/7 , 6/7
D. 2/5 , 3/5 , 1/3 , 4/7 , 5/6 , 6/7

Answer: Option D

Explanation:

First take LCM of denominators.

Here it s 210.

Then multiply with multiplier that makes denominators 210.

By doing this.

First becomes 70/210, 84/210 and soon.

Hence ans D.