divisibility of 17 18 15
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15- the number should be divisible by both 3 & 5
18- if the last digit is even and the sum of digits is divisible by 9.
18- if the last digit is even and the sum of digits is divisible by 9.
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15 the disivible to 3,5,15.
18 the disivible to3,2,18,9,6
18 the disivible to3,2,18,9,6
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