document.write( "Question 1146185: What is the missing number in this pattern 5, 6, _, 19, 44, 93, _? \n" ); document.write( "
Algebra.Com's Answer #767481 by Edwin McCravy(20060)\"\" \"About 
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document.write( "  5     6   ___    19    44    93   ___\r\n" );
document.write( "     1   ___   ___    25    49   ___\r\n" );
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document.write( "Those differences are perfect squares.\r\n" );
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document.write( "     1²   ?²    ?²    5²    7²    ?²\r\n" );
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document.write( "Their square roots are\r\n" );
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document.write( "      1  ___   ___     5     7   ___\r\n" );
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document.write( "If we fill those blanks in with successive prime numbers,\r\n" );
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document.write( "      1    2     3     5     7    11\r\n" );
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document.write( "we have 1 together with the primes. 1 is neither prime nor\r\n" );
document.write( "composite, and the primes are not composite.  So the sequence\r\n" );
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document.write( "      1    2    3      5     7    11\r\n" );
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document.write( "is the sequence of NON-COMPOSITE natural numbers.\r\n" );
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document.write( "So the differences are the successive squares of NON-COMPOSITE natural numbers,\r\n" );
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document.write( "      1²   2²   3²     5²    7²   11²\r\n" );
document.write( "or\r\n" );
document.write( "       1    4    9     25    49   121\r\n" );
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document.write( "So we fill in the missing differences and the missing terms:\r\n" );
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document.write( "    5     6    10    19    44     93   214\r\n" );
document.write( "       1     4     9    25    49    121\r\n" );
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document.write( "Edwin
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