Write a digit in the blank space of the given number $24, 1__, 279$ so that the number formed is divisible by $9$ .

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Solution

We know that A number is divisible by $9$ , if the sum of the digits of the given number is divisible by $9$ .
Here, adding the digits of the given number we get $2 + 4 + 1 + 2 + 7 + 9 = 25$ . But if we add $2$ to the given number, then the number formed will be $27$ which is divisible by $9$ .
Therefore, a digit in the blank space will be $2$ .

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