Quickly Multiply 2/3/4 Digit Numbers #shorts

A 4 digit number is randomly picked from all the 4 digit numbers, then the probability that the product of its digit is divisible by 3 is :

Find all 3 digit numbers formed with the digits 1,2,3,4 and 5 if (i) repetition of digits is allowed? (ii) repetition of digits is not allowed?

find the sum of all the 4 digit numbers that can be formed with the digits 1,2,3,4.

The smallest 4-digit number is the successor of the largest 3-digit number.

Find the number of 4 digited numbers using the digits 1,2,3,4,5,6 that are divisible by 2 when repetitions are allowed

3, 3 , 4 , 4 , 4 ,5 , 5 Find the probability for 7 digit number such that number is divisible by 2

The sum of all 4 digit even numbers that can be formed from the digits 1,2,3,4,5 is