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Question
In the following number, replace * by the smallest number to make it divisible by 9:
91*67
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Solution
91467
Here, 9 + 1 * + 6 + 7 = 23 + * should be a multiple of 9.
To be divisible by 9, the least value of * should be 4, i.e., 23 + 4 = 27, which is a multiple of 9.
∴ * = 4
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