21y8 it is a multiple of 6, value of Y is(1) 2 (2) 1
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a number will be multiple of 6 if it is multiple of 2 and 3
here unit digit is 8 . so it is multiple of 2
and it will be multiple of 3 if the sum of digits must me divisible by 3. it will be possible if y=1
here unit digit is 8 . so it is multiple of 2
and it will be multiple of 3 if the sum of digits must me divisible by 3. it will be possible if y=1
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