Posted by **Riah** on Tuesday, February 22, 2011 at 1:18am.

A music store offers a prize to a customer who can guess the closest, the number of jelly beans that fill a litre jar on the counter. estimate the number of jelly beans in the jar if 1 jelly bean is approximately 2cm (h) by 1.5 cm in diametre (d)

- Maths -
**MathMate**, Tuesday, February 22, 2011 at 11:53am
Assuming a jar of (10cm)³.

Then a crude estimate is to line them up in all three directions:

(10/2)*(10/1.5)*(10/1.5)

=5*6.7*6.7

=225

Note that I have used a fractional number of beans because we don't really line them up perfectly. They will be crossed. Also, the space between two layers could be better used by placing a jellybean in the depression between two beans of the lower layer. This can be automatically done by shaking the jar after it's been filled.

See what others give, hopefully a more refined estimate.

- Maths -
**Anonymous**, Sunday, February 27, 2011 at 8:25pm
222.2222222222222

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