List

Logs By The Fire

You've probably seen the "log" button on your calculator, but do you know what it actually does? The resources below will help you to discover how the logarithm function works and how you can use it to solve problems. 
Summing to one
problem

Summing to one

Age
16 to 18
Challenge level
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This problem is a nice introduction that will give you a feeling for how logs work and what that button on your calculator might be doing.
Factorial Fragments
problem

Factorial fragments

Age
16 to 18
Challenge level
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Here you have an expression containing logs and factorials! What can you do with it?
A big power
problem

A big power

Age
16 to 18
Challenge level
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Have you ever tried to work out the largest number that your calculator can cope with? What about your computer? Perhaps you tried using powers to make really large numbers. In this problem you will think about how much you can do to understand such numbers when your calculator is less than helpful!
Climbing Powers
problem
Favourite

Climbing powers

Age
16 to 18
Challenge level
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$2\wedge 3\wedge 4$ could be $(2^3)^4$ or $2^{(3^4)}$. Does it make any difference? For both definitions, which is bigger: $r\wedge r\wedge r\wedge r\dots$ where the powers of $r$ go on for ever, or $(r^r)^r$, where $r$ is $\sqrt{2}$?
Big, Bigger, Biggest
problem

Big, bigger, biggest

Age
16 to 18
Challenge level
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Which is the biggest and which the smallest of $2000^{2002}, 2001^{2001} \text{and } 2002^{2000}$?
Log Attack
problem
Favourite

Log attack

Age
16 to 18
Challenge level
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Solve these equations.