Solve the following equation 24 + 4 ÷ 4

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

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

(47 × 588) ÷ ( 28 × 120)=?

The smallest positive integer when multiplied by 392, the product is a perfect square, is 

Direction: what should come in place at question mark(?).

$$ {1\over 8}×(223+?)=71$$

If $${4x^2={15^2-9^2}}$$ then the value of x is

Find the value of given expression.

3 – (– 6) {– 2 – 9 – 3} ÷ 7{1 + (– 2) (– 1)}

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: