Question

If 31z5 is a multiple of 3, where z is a digit , what might be the values of z?

Answer 1

HEY MATE YOUR ANSWER IS HERE....

According to,

THE DIVISIBILITY OF 3.

If the number is multiple of 3,the sum of the digits is also divisible by 3.

Here,

$sum \: of \: the \: digits \: = 3 + 1 + z + 5 \\ \: \: \: \: \: \: \: \: \: = 9 + z \\ here \: to \: make \: it \: a \: divisible \: by \: 3 \: \\ we \: add \: 3 \\ \\therefore \\ z = 3$

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Answer 2

Answer:

z=3

Step-by-step explanation:

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