Test 3,545 for Divisibility by 3

Test for Divisibility by 3:
• A Number is divisible by 3 if the Sum of the Digits in the Number is divisible by 3
Sum of the Digits in 3,545: 3+5+4+5 = 17
17 is not divisible by 3
Therefore, 3,545 is NOT divisible by 3
Note: Since 3,545 is not divisible by 3, it follows that 3,545 is also not divisible by any multiple of 3 (6, 9, 12, …)

The solution above and all other related solutions were provided by the Test for Divisibility by 3 Application.