Question

how many even no.s can be formed by using digits 1 2 3 4 5 6 with repittion

Answer 1

applying simple permutation no of 6 digit of even digit formed is 6×6×6×6×6×3= 23,328.
for 5 digit number it would be 6×6×6×6×3
for 4 digit 6×6×6×3
and so on.. add all to get answer.