0
Anonymous
1,4,9,16,25,36,49,64
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9 and 36
No but 81 is a square number
80 cm is less.
80 is not a square number 1 is, 4 is, 9 is, 16 is, 25 is, 36 is, 49 is, 64 is, 81 is, 100 is 80 is not