Question

Solve the problem with the process
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Answer 1

No is divisible by 3

when sum of its digits divisible by 3


I.e 2 + 5 + * + 2 + 1 + 5 devisible by 3


15 + * devisible by 3, when value of * be 3

15 + 3 /3

Answer 2

LCM take into out then common term then middle term then alive for the problem.