document.write( "Question 1110202: [24,3,9] , [38,8,11] , [40,13,7] , [?,1,3]
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Algebra.Com's Answer #725211 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "The pattern is obvious:\r\n" );
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document.write( "[24,3,9]  :  24 = 2*(3+9)\r\n" );
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document.write( "[38,8,11] :  38 = 2*(8+11)\r\n" );
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document.write( "[40,13,7] :  40 = 2*(13+7)\r\n" );
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document.write( "[?,1,3]   :   ? = 2*(1+3) = 8.\r\n" );
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