Question

The number of positive integers which can be formed using any number of digits from 0,1,2,3,4,5 with out repeatation

Answer 1

One digit positive numbers = 5.
Two digit positive numbers = 25.
Three digit positive numbers = 100.
4 digit positive numbers = 300.
5 digit positive numbers = 600.
Six digit positive numbers = 600.
Total positive numbers,
= 5+25+100+300+600+600
= 1630.


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