11, 12, 14, 17, 21 (ans) 

Chaitanya_HR

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• Jul 10th, 2008

11 + 1 = 12   difference is 112 + 2 = 14   difference is 214 + 3 = 17   difference is 3hence nowdifference required is 417 + 4 = 21Thank You and Keep the spirit

coolgoose20

• Jun 15th, 2007

11+1=1212+2=1414+3=1717+4=21.......................

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