Question

if the number 500z1 is a multiple of 3, find the greatest value of z. (answer with explanation please)​

Answer 1

Answer:

as we know multiple of 3 have a unique value

• rule of multiles of 3:-

as the sum of digit are multiple of 3

then 5+0+0+1=6

then the can be any single number multiple of 3

then the number is 3 or 9

5+0+0+(z=3,9)+1

but as per question

greatest value of z is 9