You will need: a piece of paper, scissors and tape (or glue).
Make 8 paper loops, linking them to each other in pairs.
Task: link all four pairs into one chain, cutting the fewest number of loops possible.
Solution: take one pair and cut the first loop.
Cut the second loop from the same pair. You’ve made only two cuts!
Place the cut loops between the remaining three pairs as shown.
Attach the first loop, linking two pairs.
Attach the second loop, linking the third pair. The full chain of 8 loops is done, and it took only two cuts, not three!