any number is divisible by 3 when their sum come in the table like 70 5-4 equal to 7 + 0 + 5 + 4 is equal to 16 how 16 fault come is three stable so we need to for making it's 18 7 plus 0 + 5 + 2 + 4 equal to 18 hence to is the right answer please is formula mein answer de do
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let consider unknown number x
7+0+5+x+4
16+x
hit and trial
*let x be 1
16+1
17. not divisible
*let x be 2
16 +2
18 yes it's divisible
2 is correct answer
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