Divisible by 3?
Number Theory
Level
1
How many of the following numbers are divisible by 3?
\[\begin{array}{l} 1 \\ 12 \\ 123 \\ 1234 \\ 12345 \\ 123456 \\ 1234567 \\ 12345678 \\ 123456789 \\ \end{array}\]
by
A W