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 20: 2+0 = 2
2 is not divisible by 3
Therefore, 20 is NOT divisible by 3
Note: Since 20 is not divisible by 3, it follows that 20 is also not divisible by any multiple of 3 (6, 9, 12, …)
Test 20 for Divisibility by 3
The solution above and all other related solutions were provided by the Test for Divisibility by 3 Application.
