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Question
In the following number, replace * by the smallest number to make it divisible by 9:
2*135
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Solution
27135
Here, 2 + * + 1 + 3 + 5 = 11 + * should be a multiple of 9.
To be divisible by 9, the least value of * should be 7, i.e., 11 + 7 = 18, which is a multiple of 9.
∴ * = 7
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