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# DS: Digits

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Manager
Joined: 01 Nov 2005
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07 Sep 2006, 09:59
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CEO
Joined: 20 Nov 2005
Posts: 2911
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
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07 Sep 2006, 10:16
E

Assuming M3 is M^3.

St1: 100≤M<1000
10000≤M^3<1000000000: M^3 could have 5, 6, 7, 8 or 9 digits.: INSUFF

St2:
10000≤M^2<100000
i.e 100≤M<100*√10
i.e 10000≤M^3<1000000*10*√10: M^3 could have 5, 6 or 7 digits.: INSUFF

Together:
M^3 could have 5, 6 or 7 digits.
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

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