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Curious that nobody uses "stupid numbers" 23, 67, 123.
I'm always amazed at the limited ability of the human mind to visualise numbers. Try this:
1. Imagine a single orange (ok, that was easy).
2. Now imagine two oranges. Got it, well done.
3. Now imagine three oranges. NO stop putting them into a triangle, I wanted them in a straight line. Ok that's better.
4. Four oranges...mmmh see you can't do it without putting it into a 2 X 2 grid. If you try the straight line, you focus on a couple of oranges and then switch back and forth between the others.
5. Makes you realise how difficult it is for a students to have a conceptual grasp of big numbers.
6. Next time you invoke the variation in humans due to random fertilisation at 246 remember the kids (and me) are having problems with 4 oranges.
