Question

is 5783 divisible by 3 why or why not

Answer 1

Add all the digits of 5783 up. What do you get?

Answer 2

23

Answer 3

for divisible by 3 sum of all the digit must be divisible by 3

Answer 4

Is 23 divisible by 3?

Answer 5

divide it by 3

Answer 6

no

Answer 7

Then the original number is also not divisible by 3.
The test of divisibility by 3 is:
A number is divisible by 3 if the sum of its digits is divisible by 3.

Answer 8

thank you sooooo much

Answer 9

You are welcome.
There are divisibility tests for other numbers.
If you're interested, let me know.