THE SUMFIZZ EXPERIMENTS

Watch it. Try it.
Get that “aha”.

Seen a trick in a SumFizz video? This is where you make it yours. Change the numbers, test your prediction, and discover why it works.

Three hands-on experimentsInstant feedbackYour numbers, your pace

01 / MENTAL MATHS

Multiply by 11.

Keep the outside digits. Add them in the middle. Then discover what happens when you need to carry.

02 / PERCENTAGES

If 8% of 50 feels awkward, try 50% of 8. Swap the numbers, keep the answer, and see why it works.

03 / EVERYDAY MONEY

20% off, then another 20%, gives 36% off overall. Change the offers and watch what happens to the price.