What value will come in place of question mark (?) in the questions given below?

663.48 + 22.51 - 292.63 = ? + 300.44 

The product of two consecutive odd numbers is 399. Find the lower of them.

Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case. Then sum of the digits in N is:

What value will come in place of question mark (?) in the questions given below?

837 ÷ ? × 0.8 = 9.3 

The sum 9 + 16 + 25 + 36 +_______+ 100 is equal to?

The difference between the greatest and the least four-digit numbers that begins with 3 and ends with 5 is: 

Select the number triad that is analogous to the given triads.
 (64, 8, 65), (125, 27, 89)

A number is divided by 6 and 5 is added to this quotient Again sum is divided by 9 and the quotient obtained is 1. Find the number.