Question

If 15Z7 is a multiple of 3 where 'Z' is a digit, find the value of Z.​

Answer 1

Step-by-step explanation:

for this no to be divisible by 3 sum of digits should be divisible by 3 i.e -

\begin{lgathered}3 + 1 + 5 + z = 3x \\ 9 + z = 3x \\ z = 0 \\ z = 3 \\ z = 6 \\ z = 9\end{lgathered}

3+1+5+z=3x

9+z=3x

z=0

z=3

z=6

z=9