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October 20, 2014

October 20, 2014

Posted by **wan** on Saturday, March 16, 2013 at 7:02am.

- math -
**Reiny**, Saturday, March 16, 2013 at 8:03amJust put in some number

e.g. 1256

√1256 = appr 35.44

but we know that it must end in a 6, so it has to be 36

36^2 = 1296

so the missing number is a 9

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