Puzzle time: minimum lines
Thursday 12th March 2020
This rectangle has 9 straight lines, and 14 squares.
Can you find all 14 squares?
This rectangle also has 9 straight lines, and has 20 squares.
Can you find all 20?
What is the maximum number of squares you can have with a rectangle of 9 straight lines?
Find the minimum number of straight lines needed to make a rectangle with exactly 100 squares.