is anyone good at math?

sean1212··1 votes·500 views

i'm trying to do this question here:

http://i.imgur.com/m68FwwB.png

but I got no freaking clue lol. can someone help me out? it looks like a logic puzzle but mad confusing

4 Comments

KeyboardPotatoes1 votes

ooo.me like. gotta think about it, tho

DrCyanide1 votes

Well, there can only be an even or odd number of stairs, right? So the options available should have some pattern depending on that.

I recommend you write out all the possibilities for 3, 4, 5, 6, and 7 stairs. I bet the pattern will show by then.

KeyboardPotatoes1 votes

Ok. I've got it. It's a Pascal's triangle question. Look up Fibonacci numbers on wikipedia.

sean12121 votes

yeah i didn't know what that was but it looks like it has a fibonacci sequence quality. The problem I don't know is if we do "n" steps, how to derive some sort of formula for that. n=1 - n=6 are trivial cases but idk im 2 dumb for this crap

going with a step, you have n-1 steps left, and with a hop, n-2 steps left. whats next..

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