Question

If 51m23 is divisible by 3 , then find all the possible values of m.​

Answer 1

ANSWER

if a number is divisibke by 3.

then the sum of numbers is a factor of 3.

ex- 99=9+9= 18

18 is a factor of 3

so, 99 is divisibke by 3

therefore

5+1+m+2+3

11+m= factor of 3

(let us think what is a factor of 3 after 11 is 12. so the factor of 3 is 12. let's subtitute 12 in the equation)

11+m=12

m= 12-11

therefore m= 1

the number is 51123

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