If the sum and difference of two number are 20 and 8 respectively, then the difference of their squares is: 

Find the value of   $$ {(0.75)^3\over1-.75}+[0.75+(0.75)^2+1]$$

Direction : What should come in place of the question (?) in the following question.

140% of 450 + 24% of 650 =?

The number, whose square is equal to the difference between the squares of 975 and 585, is: 

(5.5)³-(4.5)³ is equal to : 

Evaluate: $${-(4-6)^2-3(-2)+।-6।\over 18-9÷3×5}$$

The sum of the squares of two positive integers is 100 and the difference of their squares is 28. The sum of the numbers is: