Find the sum of all 2 -digit numbers.

Find the sum of all 3-digit numbers which leave remainder 2, when divided by 5.

Find the sum of all two digit numbers which when divided by 4, yields 1 as remainder.

Find the sum of all five digit numbers ,that can be formed using the digits 1, 2, 3, 4 and 5 (repetition of digits not allowed)

Find the sum of all 2 digits no. which when divided by 9, it leaves a remainder 3?

Find the sum of all the four digit numbers which are divisible by 29.

Find the sum of all odd numbers of four digits which are divisible by 9.

Find the number of n digit numbers, which contain the digits 2 and 7, but not the digits 0, 1, 8, 9.

Find the sum of all natural numbers below 500 which are divisible by 8.