Math Is Fun Forum

Indeed. The internet has such great potential, as long as it is not squandered.

http://en.wikipedia.org/wiki/Logarithm# … _logarithm

Some infinite series that converge to natural logarithms. To convert them to base 10 logs, simply divide by the natural log of 10.

Perhaps a more suitable explanation could be given if you could tell us what level your maths is at.

Physicists probably wouldn't get paid that much, no matter what they were researching, but they sure get paid a lot.

Area of a regular n-gon if the side length is known

Where n is the number of sides of the n-gon, and s is the side length.

Area of a regular n-gon if the diagonal length is known (formulated myself ):

Where n is the number of sides of the n-gon and R is the length of a diagonal.

(Oh I see ganesh has the first formula in a different form)

Numbers increase veeery quickly with large exponents, so you want to have the biggest one you can here.
So the answer is a, as that gives

Wow. That is amazing!

Learning the abacus actually seems like a pretty fun thing to do, and yeah, they have conducted competitions and the abacus usually beats the electronic calculator.

Thanks it makes sense now