math
posted by dolores .
Grace has 16 jellybeans in her pockets. She has 8 red ones, 4 green ones, and 4 blue ones. What is the minimum number of jellybeans she must take out of her pocket to ensure that she has one of each color?

You just have to imagine the scenario that will cause her to take out the most jelly beans.
She could pick all the red ones, pick all the green ones, and then finally pick a blue one. You do the addition. 
Oops... the MINIMUM. Sorry about that. (The above was for the maximum.)
She could pick a red, green, and blue right off the bat. Do the addition. 
I'm officially insane. Ignore that. My original explanation is correct.