The prime factorization of 45 = 5 x 9
25110 is divisible by 5 as 0 is at its unit place
25110 is divisible by 9 as sum of digits is divisible by 9.
Therefore, the number must be divisible by 5 x 9 =45
The prime factorization of 45 = 5 x 9
25110 is divisible by 5 as 0 is at its unit place
25110 is divisible by 9 as sum of digits is divisible by 9.
Therefore, the number must be divisible by 5 x 9 =45
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