How many 3-digit numbers have the property that the units digit is at least twice the tens digit plus 5?
+2666 There are 9 choices for the hundreds digit.
The only possible cases for the tens and units digits are: (0, 5 - 9), (1, 7 - 9), (2, 9)
This makes for 9 cases for the units and tens digits.
Thus, there are \(9 \times 9 = \color{brown}\boxed{81}\) cases.
