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1. Find the digit that makes 3,71_divisible by 9.0307Ol05

1 Answer

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For a number to be divisible by 9, the sum of the digits of the number msut give a multiple of 9

3 + 7 + 1 = 11

The missing number when added to 11 must give a multiple of 9. Considering all the options

3 + 11 = 14. This is not a multiple of 9 hence 3 is not the number

7 + 11 = 18. This is a multiple of 9 hence 7 is the right option

User Mark Stickley
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