Posted by Indy on October 29, 2002 at 17:11:16:
Why do the sum of digits of squares always add up to 1 or 4 or 7 or 9?like 784 = 7+8+4 = 19 = 1+9 = 10 = 1+0 = 11024 = 1+0+2+4 = 7
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Comments: : Why do the sum of digits of squares always add up to 1 or 4 or 7 or 9? : like 784 = 7+8+4 = 19 = 1+9 = 10 = 1+0 = 1 : 1024 = 1+0+2+4 = 7
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