document.write( "Question 632981: When you square any integer, the last digit of the number you get will never be an eight.
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\n" ); document.write( "\n" ); document.write( "to prove this i've tried...
\n" ); document.write( "1^2=1 2^2 = 4, 3^2 = 9, 4^2 = 16, 5^2 = 25, 6^2=36, 7^2=49, 8^2=64, 9^2=81, 10^2 = 100
\n" ); document.write( "as you can see this is true for single digits i've tried double digits as well up till 30^2, and clearly enough the last digit is never an eight.
\n" ); document.write( "from what i've got above im guessing that this statement is true!\r
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Algebra.Com's Answer #398582 by Edwin McCravy(20054)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Every integer ends with either a 0,1,2,3,4,5,6,7,8, or 9.\r\n" );
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document.write( "The last digit of the square of a number that ends with 0, ends with 0×0 or 0\r\n" );
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document.write( "The last digit of the square of a number that ends with 1, ends with 1×1 or 1\r\n" );
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document.write( "The last digit of the square of a number that ends with 2, ends with 2×2 or 4\r\n" );
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document.write( "The last digit of the square of a number that ends with 3, ends with 3×3 or 9\r\n" );
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document.write( "The last digit of the square of a number that ends with 4, ends with what 4×4 or 16 ends with, namely 6.\r\n" );
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document.write( "The last digit of the square of a number that ends with 5, ends with what 5×5 or 25 ends with, namely 5.\r\n" );
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document.write( "The last digit of the square of a number that ends with 6, ends with what 6×6 or 36 ends with, namely 6.\r\n" );
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document.write( "The last digit of the square of a number that ends with 7, ends with what 7×7 or 49 ends with, namely 9.\r\n" );
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document.write( "The last digit of the square of a number that ends with 8, ends with what 8×8 or 64 ends with, namely 4.\r\n" );
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document.write( "The last digit of the square of a number that ends with 9, ends with what 9×9 or 81 ends with, namely 1.\r\n" );
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document.write( "So squares can only end with 0,1,4,5,6, and 9\r\n" );
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document.write( "Therefore squares cannot end with 2,3,7, or 8.\r\n" );
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document.write( "Edwin

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