Question

for what possible values of x the number 36x i.e.,3×100+6×10+x is divisible by 3

Answer 1

a no. is divisible by 3 when sum of all the digits is divisible by 3
adding the digits
3+6+x= 9+x
now, the nearest multiple upon comparing is 9
also other near multiples are 12,15,18
putting these values, we get
either,
9+x=9,12,15,18
x=0,3,6,9
ans: possible values of x are 0,3,6,9

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Answer 2

3+6+x= 9+x

9+x=9,12,15,18 (we use this value because we have taken the table 3)

x=9-9

x=0

x=12-9

x=3

x=15-9

x=6

x=18-9

x=9

(0,3,6,9)

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