Question

15 ka vibhajta ka niyam​

Answer 1

To be divisible by 15 a number has to be divisible by 3 and by 5.

To be divisible by 5 the number must end in a 0 or a 5, easy enough.

Divisibility by 3 - the rule is to add up all of the digits of the number and if they are a multiple of 3 then the original number is also.

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Answer 2

jo digit 5 or 3 dono se puri trah vibhajit ho jaye wo 15 se puri trah se vibhajit hoga.