OK. Got it. Now what to do with the list ?
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1, 4, 9, 16, 25, 36, 49, 64, 81, and 100.
38.5
Only perfect squares can have an odd number of factors. The answer is 16. It has five factors: 1,2,4,8,16.
If you don't specify the size of the squares, we can't give an accurate answer. There are 400 one-unit squares and 200 two-unit squares and 4 ten-unit squares and so on.
A square has 4 angles, so ten squares have 10*4 = 40 angles.