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The number of 5 digit numbers which are divisible by 4, with digits from the set {1,2,3,4,5} and the repetition of digits is allowed, is...........

Answer:

Explanation:

A number is divisible by 4 if last 2 digit number is divisible by 4

                 Last two digit number divisible by 4 from {1,2,3,4,5} are 

                     12,24,32,44,52

  The number of 5 digits number which are divisble  by 4 , from the digit (1,2,3,4,5)  and digit is repeated is

            5× 5× 5× (5× 1) =625