Second part og knowledge (mathematical)

[notjer]

The last thread got a bit screwed, and now I want to ask you about something slight different.

I've been trying to make a tabl for knowledge (mathematical) with dc checks and I want some responds to improve it.

I was thinking of table earlier, to determite DC for checks.
All task are approximately.

Knowledge (mathematic)

Without this skill you can only answer tasks with a dc 10 or lower. with 5 or more ranks you can take 10.

DC 5: Simple calculation task with addition, multiplication, division and minus. (2 digital) (2 rounds)
DC 10: Difficult calculation task addition, multiplication, division and minus. (4 digital) 6 rounds)
DC 15: Very difficult calculation task with addition, multiplication, division and minus. (7 digital) (10 rounds).

DC 15: Solve simple equation and quadric equation.
DC 15: Solve simple trigonometri task with sinus, cosnius, and tangens.
DC 20: Solve difficult equation and quadric equation.
DC 20: Solve difficult trigonometri task with sinus, cosnius, and tangens.
DC 25: Solve very difficuelt trigonometri task with sinus, cosnius and tangens.
DC 15: Create a statistic
DC 15: Simple analyse of a statistic
DC 20: Advance analyse of a statistic
DC 25: Use quadric equation in practics
DC 20: Prove the correctness of simple calculations, solves, and analyses.
DC 25: Prove the correctness of difficult calculations, solves, and analyses
DC 35: Prove the correctness of difficult calculations, solves, and analyses.

Head calculation: +10 to dc

What do you think about that?

 

[Vrecknidj]

I don't think adding 10 to the DC for doing a calculation in your head accurately reflects the difficulty. Some are easier than others.

I can solve quadratics that have integer solutions in my head all day long, but I'd be stumped finding the sin or cos of some unusual angle out to, say, 8 decimal places (or, heck, 4 decimal places).

Dave

 

[notjer]

Would you do it to a +5 dc?

It is hard to make an easy solution to knowledge (math) which is easy to use, it is not as other knowledge which a succesful roll just hand out the answer to you.

Anything else I should change?