12.5% of 550 - 11% of 221 =? – 1.56

Find the wrong number in the series: 2, 9, 28, 65, 126, 216, 344

If log_n 54=a and log_n72=b, find log_n 1728 in terms of a and b.

3/8 of 168 x 155+?-5499+235

4 , 9, 25, 49, _____

Let A denote the set of positi8ve integers each of which when divided by 2,3,4,5,6 leaves a remainder of 1,2,3,4,5 respectively. How many numbers in A are between 0 and 100?

How many numbers greater than a million can be formed using digits 0,6 ,6, 7 , 0, 0 , 6, and 7

(46)² – (?)² = 4398 – 3066

1399x1399=?

If 3√5 + √125 = 17.88, then what will be the value of √80 + 6√5 ?