#5 Diagonal lines
Set by Katie Steckles
A square has two diagonals (lines that run from one corner to a different corner, but not between two corners on the same edge).
How many diagonals does a pentagon have? What about a hexagon?
What kind of regular polygon has a number of diagonals that is three times the number of its corners?
Solution next week
#4 Addition subtraction
Solution
For the four-number case, we can do 12 + 34 = 43 + 2 + 1.
For the five-number case, while 12 + 34 + 5 = 5 + 43 + 2 + 1 will…
