I’ve got a square piece of paper, with lines for writing on both sides. Right now, the lines are running up and down the page. To get the lines running left and right, I could rotate the page, but that’s too boring. Can I do it by flipping the page instead?
Get a piece of paper and try it yourself – it’s a lot easier than doing it in your head.
It can be done! Pick up the paper by opposite corners – say, top left and bottom right, and flip it diagonally.
Also in this newsletter
For more brainteasers and puzzles for kids, subscribe to Double Helix magazine!