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Pancake Puzzle

N/A

Pancake Puzzle

A hungry turtle wants to make 6 pancakes as soon as possible. However, he only has a small pan which can only contains 4 pancakes at a time. Suppose that it takes him 5 minutes to cook 1 face of a pancake, what is the minimum time he needs to cook all 6 pancakes?
5 REPLIES
N/A

Pancake Puzzle

First thoughts say 20 mins.

But I have no doubt in my mind I am wrong Tongue
N/A

Pancake Puzzle

Nope, sorry mate, do you want to go 50-50 or phone a friend!
Alecto
Grafter
Posts: 2,886
Registered: 30-07-2007

Pancake Puzzle

How about 15 mins?
6 pancakes = 12 faces, 4 faces takes 5 mins, so 12 takes 15? :roll:
N/A

Pancake Puzzle

the answer is 15, that could be one way of doing it, the other is


Start 4 pancakes in the pan - 5 minutes
Flip 2, remove 2 and add two more - 5 minutes
Remove 2 done, flip 2, and put back half-done 2 - 5 minutes

That's 15 minutes total.
rja66
Rising Star
Posts: 401
Thanks: 1
Fixes: 1
Registered: 31-07-2007

Pancake Puzzle

Didnt know turtles ate pancakes... :roll: