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by earth@work » Tue Dec 02, 2008 6:03 pm
imo:B 7550
2+4+........+98+100 =2550
now, 102+104+..............+198+200
(100+2) +(100+4)+........+(100+98)+(100+100)
(100+100+.......100)50 times +(2+4+......+98+100)
50*100 + 2550=5000+2550 = 7550
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