Question

using the digits 1,2,2,3,0 how many numbers greater than 20000 can be formed

Answer 1

Assuming digits are to be used only once then as long as the first digit is greater than 1, any number formed will be greater than 20000:

3*4*3*2*1=72

Answer 2

The number of numbers greater than 20000 that can be formed using the digits 0 1 2 3 4 9, digits being repeated, is 5,183.