document.write( "Question 996701: What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first and second, and the last is three times the second? \n" ); document.write( "
Algebra.Com's Answer #615192 by MathTherapy(10555)\"\" \"About 
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\n" ); document.write( "What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first and second, and the last is three times the second?
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Let 1st digit be F 
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document.write( "Then 2nd digit is: 3F
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document.write( "Also, 3rd digit is: F + 3F, or 4F
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document.write( "And, 4th digit is: 3(3F), or 9F\r
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document.write( "It's obvious, based on the above clues - especially the fact that the 4th digit is: 9F - that F can only be 0 or 1, and since it cannot be 0, it MUST be 1
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document.write( "From there, we now know that the:
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document.write( "4th digit is: 9(1), or 9
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document.write( "2nd digit is: 3(1), or 3
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document.write( "3rd digit is: 4(1), or 4\r
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document.write( "4-digit number: \"highlight_green%281349%29\" \n" );
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