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On Friday the magic plant was only 2 centimetres tall. Every day it doubled its height. How tall was it on Monday?

Number Balance

Stage: 1 Challenge Level: Challenge Level:2 Challenge Level:2

If a weight on the $10$ hook balances with a weight on the $2$ hook together with a weight on the $8$ hook, can you see how the balance works?
How can you tell from the pictures or interactivity which side is lighter?