Question

. If 715x is a multiple of 3, find all possible value of x​

Answer 1

Answer:

WE KNOW THAT TO FIND DIVISIBILITY BY 3 WE HAVE TO ADD THE DIGITS IN THE GIVEM NUMBER AND IF THEIR SUM IS A MULTIPLE OF 3 THEN THE NUMBER IS DIVISIBLE BY 3.

HERE, 7+1+5 = 13

WE KNOW - 3×5 = 15

13+2=15

x=2

SIMILARLY

3×6 =18

16-13 = 3

x =3

THUS, SO ON CAN BE DONE

THEREFORE, WE CONCLUDE THAT VALUE OF x CAN BE A MULTIPLE OF THREE WHICH IS GREATER THAN 12

WE GET THAT - x is divisible by3 > 12

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Answer 2

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