Balance Masters: Shape Equations, the Fake Coin and Heavier-or-Lighter Puzzles
Children read several balanced scales to find each shape's weight, using whole numbers from 1 to 20. They then solve the famous fake coin puzzle: find the one lighter coin among nine in only two weighings by splitting into three groups of three. A last puzzle orders five treasures.
Part of the pack
Critical Thinking Worksheets for Ages 9-10: Mastermind Academy Logic Puzzle Pack
This is page 20 of the pack. Ages 9-10
About this worksheet
- Topic:
- Balance equations and the fake coin
- Skill:
- Weight Comparison (Measurement - Weight): Compare objects by weight - heavy and light.
- Pack:
- Page 20 of 24 in Critical Thinking Worksheets for Ages 9-10: Mastermind Academy Logic Puzzle Pack.
How to use this worksheet
Use the scales one at a time and check the total. For the fake coin, complete the flow diagram with the 3-3-3 plan. For the final puzzle, order the treasures from lightest to heaviest.
Materials needed
- Pencil
Extension activities
- 1Use a kitchen scale to check guesses: which fruit weighs more?
- 2Test the 3-3-3 plan with coins and a balance.
Written by
Hemsweta Jain · Teacher Cheena
MBA and Early Childhood Educator, teaching since 2014 · Founder of RaisoActive, Mumbai
Every RaisoActive worksheet is designed and checked by the founder before publishing.
Published · Last reviewed
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