A student multiplies a number with 7.2 instead of 0.72. If due to this answer is 2592 more than the right answer, then what was the original number? 

Divide 32 into two parts such that the sum of the square of the parts is 674 what is the value of the parts? 

How may digit are required to write numbers from 1 to 50?

The difference of a number consisting of two digits from the number formed by inter changing the digits is always divisible by: 

How many two-digit numbers are divisible by 3 but not by 7?

A number divided by 13 leaves a remainder 1 and if the quotient, thus obtained, is divided by 5, we get a remainder of 3. What will be the remainder if the number is divided by 65?

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

8424÷ 135 ×6=?

If ' n ' be any natural number , then by which number ( n⁴-n ) is always divisible ?