8. Determine all three-digit numbers $\overline{abc}$ divisible by 4 and 13, for which the sum of the digits is equal to 18.
8. 9. method:

If the number $\overline{a b c}$ is divisible by the numbers 4 and 13, it must also be divisible by $4 \cdot 13=52$.

2 points

Three-digit numbers divisible by 52 are:

104, 156, 208, 260, 312, 364,

2 points

416, 468, 520, 572, 624, 676,

2 points

728, 780, 832, 884, 936 and 988.

2 points

The sum of the digits is 18 only for the numbers 468 and 936.

2 points