Can the number `6^n`, n being a natural number, end with the digit 5? Give reason.

Mean of first n natural numbers is

Median of 1st n natural numbers is

Consider the numbers of the form 4^n where n is a natural number. Check whether there is any value of n for which 4^n ends with zero?

Find the median of first n-natural numbers.

Find the variance of first n natural numbers.

The total number of six-digit natural numbers that can be made with the digits 1, 2, 3, 4, if all digits are to appear in the same number at least once is a. 1560 b. 840 c. 1080 d. 480

The sum of the cubes of first n natural numbers is -

The mean of square of 1st n natural number is

The sum of the cubes of 1st n natural numbers is

Find the number of number between 300 and 3000 that can be formed with the digits 0,1,2,3,4 and 5, no digit being repeated in any number.