problem
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Bracelets
Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?
problem
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Square Corners
What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?
problem
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First Connect Three
Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?