# Jelly Beans (where I come from anyway)

Discussion in 'Math' started by drewlas, May 17, 2008.

1. ### drewlas Thread Starter New Member

May 12, 2008
7
0
Just something trivial:
In a bowl of jelly beans, all but four are red, all but four are green and all but four are black.
How many jelly beans are in the bowl?
drewlas

2. ### Dave Retired Moderator

Nov 17, 2003
6,960
145
Six.

2 Red, 2 Green and 2 Black.

Dave

3. ### Caveman Active Member

Apr 15, 2008
471
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But there could be other colors. For example
Red = 1
Green = 1
Black = 1
Pink = 2

This would leave 5.

If there is at least one other color and we agree that all three of the mentioned colors each have at least one, then there must be one of each of those colors, and a total of two of the other color or colors.

4. ### Dave Retired Moderator

Nov 17, 2003
6,960
145
This is true. I was inferring that the only colours available were those mentioned in the OP.

Dave

5. ### wiltec New Member

May 12, 2008
3
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number of beans = x = (x-4) + (x-4) + (x-4)
ie x=3x-12
ie 2x=12
ie x=6= no of beans

May 12, 2008
7
0