Question

If a number has a 9 in the ones place,it is always divisible by 3

Answer 1

Are 19 and 29 divisible by 3?

Answer 2

No

Answer 3

[AI-generated answer — Explain Bot]

To determine if a number is divisible by 3, you can use the rule that the sum of its digits should be divisible by 3. However, having a 9 in the ones place does not guarantee that a number is always divisible by 3.

For example, consider the number 19. While it has a 9 in the ones place, the sum of its digits (1 + 9) equals 10, which is not divisible by 3. Therefore, 19 is not divisible by 3.

On the other hand, if a number has a 9 in the ones place and the sum of its digits is divisible by 3, then the number is indeed divisible by 3. For instance, consider the number 99. The sum of its digits (9 + 9) equals 18, which is divisible by 3. Therefore, 99 is divisible by 3.

In summary, having a 9 in the ones place is not a sufficient condition for a number to be divisible by 3. To determine if a number is divisible by 3, you should check if the sum of its digits is divisible by 3.