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Question

If 24y5 is a multiple of 3 where y is a digit write down the possible values of y

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Solution

We know that :A number is divisible by 3 if the sum of the digits of the number is divisible by 3.Now, The given number is 24y5.Now, 2+4+y+5 = 11 + yNow, y can take the values : 1, 4 and 7.11 + 1 = 12, that is divisible by 311 + 4 = 15, that is divisible by 311+7 = 18, that is divisible by 3

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