Question

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

Answer 1

Answer:

z = 0 or 3

Step-by-step explanation:

if u sum the digits 3,1,5 u get 9. According to divisibility rule of 3 sum of the digits must be divisible by 3. 9 is divisible by 3. If u add 3 the sum will be 3+1+3+5=12 and 12 is divisible by 3 and if u add 0the sum will be 3+1+0+5=9 which is also divisible by 3.

so according to me u can write z as 0 or 3

please mark as brainliest answer.