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Growth patterns and figurate numbers
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5-point ladder

Growth patterns and figurate numbers, 5-point ladder

●●●5 points, difficulty 3 of 35 pt

Needs an idea, not just a procedure.

3 in a row to finish this ladder.

0/1 solved

KA-0138

about 90s

Squares of dots grow: 1 dot, then 4, then 9, then 16. How many dots are in the seventh square?