There are some water lilies in a lake.

The area that they cover doubles in size every day.

After 17 days the whole lake is covered with water lilies.

How long did it take them to cover half the lake?

Click here for the WATER LILIES worksheet.

Click here for the Notes for Teachers for Year 10.

This activity is adapted from the NRICH task Water Lilies with permission of the University of Cambridge. All rights reserved.

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