What is a Logarithm?

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Did you get the answer?

This means 'What power of 5 is 25', and the answer is '2'
It can also be arranged this way:

A logarithm is just a power. And the power need not be a whole number. For example:

10¹ = 10 10^1.76= 5710²= 100
The logarithm need not have a whole number answer either:

'What power of 10 is 57?' It's about 1.76

O.K., now you know what logarithms are! This is a topic in the current Alberta Math 30 course.
If you think you're up to it, here's a short quiz on logarithms!