Question

replace the * by smallest digit so that the number is divisible by 9? = 51*21

Answer 1

Hey
Here's your answer !!

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Whenever the sum of the digits of a number is such that it is divisible by 9 then the number itself is divisible by 9 .

Here in this given number ,
the sum of the digits is 5 + 1 + * + 2 + 1 = 9 + * .
So , the smallest number that can be substituted in place of * such that the number is divisible by 9 is 0 .

So the number is 51021 .
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Hope it helps !!

Answer 2

Answer:

Step-by-step explanation:

Divisibility rule of 9

Sum of all digits ( 5+1+2+1) = 9