The pages of a book had been numbered 1 to 100 manually. How many times will it be essential to write the digit 5? 

Which of the following least number can be subtracted from 2486 to make it a perfect square?

if 12 ( 20 ) 16 and 21 ( 35 ) 28, then what is value of A in 48 ( 80 ) A ? 

If ‘+’ means ‘÷’, `-` means `×`, `÷` means `+` and `×` means `-`, then
36 × 12 + 4 ÷ 6 + 2 - 3 = ?

The average age of father and his son is 22 years. The ratio of their ages is 10 : 1 respectively. What is the age of the son?

If ‘×’ denotes ‘ – ‘. ‘+’ denotes ‘×’ . ‘÷’ denotes ‘+’ and ‘ – ‘ denotes ‘÷’. Then Find out the value of the following equations.
175 – 25 ÷ 5 + 20 × 3 + 10=?

The ratio of the present ages of Veeru and Sunita is 14:17 respectively. After 6 years from now the ratio of their ages will be 17:20, then what is the present age of Sunita -

If “S” denotes “multiplied by”, “V” denotes "subtracted from", "M" denotes "added to" and "L" denotes "divided by", then
96 L 8 S 4 V 16 M 9 = ?