If 146 Is divisible by 5<sup>n</sup>, and then find the maximum value of n.

The sum of all natural numbers from 75 to 97 is -

5349 is added to 3957. Then 7062 is subtracted from the sum. The result is not divisible by :

If the product of two positive numbers be 1575 and their ration is 7 : 9, then the greatest number is :

On multiplying a number by 7 all the digit in the product appear as 3's , the smallest such numbers is -

The sum of first five prime numbers is:

What is the least number when divided by 8, 12, 20 and 30 leaves a remainder 4 and when divided by 21 leaves a remainder…

The smallest number of four digits which on division by 4, 6, 10 and 15 leaves a remainder 2 in each case is: