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Tangram Paradox

How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!

Making Maths: Making a Tangram

Follow these instructions to make a three-piece and/or seven-piece tangram.

Making Maths: Birds from an Egg

Can you make the birds from the egg tangram?

World of Tan 16 - Time Flies

Age 7 to 11 Challenge Level:

This activity follows on from World of Tan 15 - Millennia.

Granma T and Mah Ling are sitting together during a lull in the afternoon, when all the big tasks for the day have been done and only a few small jobs still need completing. They are finishing off the day's work and preparing for tomorrow over a warming cup of tea.

Granma T: Doesn't it feel nice to sit down for a few minutes? It's been so busy during the New Year, with all the festivities and the cleaning taking up most of our time.

Mah Ling: This is my favourite time of year - the few days after the Festival of Lanterns when we can start looking forward to the year ahead.

Granma T: More and more often, I find myself looking back instead of forwards. For instance, surely it can't have been a whole year since the last Festival of Lanterns?

Mah Ling: I know, it only feels like yesterday that we were celebrating the start of the Year of the Dragon, and now we're already into the Year of the Snake! When I was little, time seemed to drag...

Granma T: ...But now that we're getting older, it feels like time keeps speeding up. Celebrating the start of a new year serves as a good reminder that time flies.

Mah Ling: That reminds me, there's only a few minutes left to get your letters in the post!

In the meantime, complete the silhouette of the candle.

Extra activities:

  • Try this activity to see if you can estimate how long a minute is. Sit down and ask your friend to carefully time a minute. When you think one minute has passed, stand up. How close were you? 
  • Repeat the experiment. Was your estimate closer to a minute? How can you improve your estimate?

The story continues in World of Tan 17 - Weather.