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Question
In the following number, replace * by the smallest number to make it divisible by 3:
8*711
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Solution
81711
Here, 8+ * + 7 + 1 + 1 = 17 + * should be a multiple of 3.
To be divisible by 3, the least value of * should be 1, i.e., 17 + 1 = 18, which is a multiple of 3.
∴ * = 1
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