SOLUTION: If21y 8 is multiple of 6,where y is a digit, them what is the value (S)of y?

Question 792493: If21y 8 is multiple of 6,where y is a digit, them what is the value (S)of y?
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
A number whose digits (in order) are 2, 1, y, and 8 is obviously even (multiple of 2).
For that number to be a multiple of 6, it has to also be a multiple of 3.
To be a multiple of 3, the sum of the digits must be a multiple of 3,
so must be a multiple of 3
The choices are
--> , or
--> , or
-->
The value of that digit will be
In 2118, and the value of y in that number is 10.
In 2148, and the value of y in that number is 40.
In 2178, and the value of y in that number is 70.
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