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Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Grade 6
Remove the white squares from the board using a simple rule of logic.
42 brainteasers to solve in all!
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XLOX - Learning Connections
Essential Skills
Problem Solving - 42 puzzles in all
Logical Thinking - look for the best sequence of steps
Spatial Reasoning - determine where new squares will appear

Common Core Connection
MP1 - Make sense of problems and persevere in solving them.
MP7 - Look for and make use of structure.
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