document.write( "Question 350524: How many whole numbers less than 500 have seven as the sum of their digits? \n" ); document.write( "

Algebra.Com's Answer #250596 by ewatrrr(24785) $\"\"$ $\"About$

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Hi,
\n" ); document.write( "*Note: Let htd represent the numbers less that 500.
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\n" ); document.write( "Question states:
\n" ); document.write( "h + t + d = 7
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\n" ); document.write( "Starting with the 400s
\n" ); document.write( "4 + t + d = 7
\n" ); document.write( "t + d = 3 (0,1,2, 3 are the possible values of t)
\n" ); document.write( "403, 412, 421,430
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\n" ); document.write( "300s
\n" ); document.write( "3 + t + d = 7
\n" ); document.write( "t + d = 4 (0,1,2,3,4 are the possible values of t)
\n" ); document.write( "304, 313, 323, 331, 340
\n" ); document.write( ".
\n" ); document.write( "Repeat process for the 200s, the 100s and when h =0 (the 2-digit numbers) \n" ); document.write( "

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