In a class, 3/5 of the students are girls and rest are boys. If 2/9 of the girls and 1/4 of the boys are absent. What part of the total number of students are present?

$$(49)^{15}-1$$ is exactly divisible by :

one fourth of a tank holds 135 litres of water. What part of the tank is full if it contains 180 litres of water ?

Fraction between 2/5 and 4/9 is:

A man spends 1/4^th of his income on food, 2/3^rd of it on house rent and the remaining income which is Rs. 630 on other commodities. Find his house rent.

What approximate value should come in place of question mark.
(1814 .9  ÷  121) x 35.78 ÷ 45.1023 = ? 

Thirty-five percent of 740 is 34 more than a number. What is two-fifths of the number?

A person gives 1/4  of his property to his daughter, 1/2  to his sons and 1/5 for charity. How much has he given away?