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

The ratio of present ages of Suresh and Manish are 5 : 1 respectively. After how many years the ratio of the ages of Suresh and Manish will become 3 : 1 if the present age of Manish is 7 years -

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

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 = ?

If in a certain way, 3 + 4 = 25 and 7 + 24 = 625, then Find the value of 9 + 40 =?

If 2 is added to each even digit and 1 is subtracted from each odd digit in the number 945217, then what will be the sum of number/numbers not repeated in the new number?