Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
Note: You can take 10% off all Slashdot Deals with coupon code "slashdot10off." ×

Comment Partial answer to twelve marbles (Score 1) 1965

12 marbles, 1 balance scale, 3 chances to use the scale.
One marble is different in weight (lighter or heavier).
How do you find which one?

(more clues to answer below)

3 places to put the marbles,
Balance Scale [left side, right side] , and on the table.

3 states for the balance Scale: left side goes up, left side goes down, no movement.

The full answer is very elegant.
Very fun to write down.
Then more questions come up, like: how many trials are necessary for 13 balls? 16? 30? any random number?

If bankers can count, how come they have eight windows and only four tellers?

Working...