Question

If three digit number 42x is divisible by 9. Find the value of x.​

Answer 1

Step-by-step explanation:

given:

no. =42x

it's divisible by 9

42x/9=y

42x=9y

x=3 as only 9×47 gives 42x

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Answer 2

Answer:

divisibility rule of 9 is the sum of all the digit should be divisible by 9

so , 4+2+x= 9 multiple

6+x=9 multiple

if there will be 18 at the place of 9 multiple so x will be 12.

and the digit will 4212

but it is 4 digit no.

and we want 3 digit no

so we have to take 9 at the place of 9 multiple

6+x=9

x=9-6

x=3

there fore the no. is 423

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