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January 28, 2015

January 28, 2015

Posted by **Laura** on Sunday, October 29, 2006 at 1:55am.

If you are refering to logs, 12 base 5 means log of 12 to the base 5. Call it x.

5^x = 12.

x = log 12/log 5 (any log base can be used)

x = 1.07918/0.69897 = 1.54396

If "5" is refering to the base of a counting systems, and you can write only single-digit numbers 0,1,2,3, 4, then 12 (in the tens-based terminology that we use) is two 5's (5^1) and 2 ones (5^0), and would be written 22.

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