Question 12
With 2 lines, John can cut a square into 4 different pieces. If he wants to cut the square into 11 different pieces, at least how many lines does he need?
Editorial question note: each line is one straight cut through the flat square. Keep the pieces in place; do not fold, stack or rearrange them between cuts. Count the separate pieces formed.
Editorial question note: each line is one straight cut through the flat square. Keep the pieces in place; do not fold, stack or rearrange them between cuts. Count the separate pieces formed.