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Just P&P (Posted on 2011-01-23) Difficulty: 3 of 5
No calculator, no tables-
Please evaluate lg 7 within .01.

Rem: lg 7 is a decimal (by base 10) logarithm of 7.

No Solution Yet Submitted by Ady TZIDON    
Rating: 4.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Hints/Tips re: Another way - modified | Comment 5 of 6 |
(In reply to Another way - without remembering any irrational logarithms by Kenny M)

EXCELLENT IDEA, BUT YOU'LL GET MUCH BETTER RESULT.if you make a table of 7^n, n being all negative integers.

I got 11/13 , which is about .001 away from the true value of lg7.

I give you full credit for going in  the other direction, still

I did it your way.

Edited on January 23, 2011, 4:47 pm
  Posted by Ady TZIDON on 2011-01-23 15:52:35

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