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immediately followed by 7

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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immediately followed by 7

by sanju09 » Wed Sep 15, 2010 1:40 am
How many 1's are there in the following sequence which are immediately preceded by but not immediately followed by 7?

719117189171213145713917


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by sgmuthukumar » Tue Sep 21, 2010 1:55 am
four
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by sanju09 » Tue Sep 21, 2010 2:11 am
sgmuthukumar wrote:four
how?
The mind is everything. What you think you become. -Lord Buddha



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by sgmuthukumar » Tue Sep 21, 2010 2:46 am
719117189171213145713917
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