3. Determine the largest three-digit number that, when divided by 18, has a remainder of 11.
3. The sought number is of the form $18 \cdot k+11$ and is a three-digit number. 1 point

Since $999=18 \cdot 55+9$, it follows that $990=18 \cdot 55$. 1 point

$18 \cdot 54+11=983$. 1 point

The largest three-digit number that, when divided by 18, has a remainder of 11 is $983$. 1 point

TOTAL 4 POINTS