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Toast Schedule (Posted on 2013-05-13) Difficulty: 3 of 5
Ricardo's old toaster can hold at most two slices of bread and toast them on one side at a time. He wants his bread toasted on both sides and buttered on one side.

It takes:
  • 3 seconds to put each slice into the toaster and,
  • 30 seconds to toast one side of 1 or 2 slices and,
  • 3 seconds to reverse a slice and,
  • 12 seconds to butter one side (that side must already be toasted).
  • 3 seconds to remove a slice from the toaster without putting it back in reverse.
Assuming that, only one of these operations can be done at a time:

In how short a time can Ricardo toast and butter three slices?

No Solution Yet Submitted by K Sengupta    
Rating: 1.3333 (3 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts He that drools, rules | Comment 2 of 3 |
I know that this is against the rules, but I am going to butter my first side while the last two slices are toasting.  Otherwise, I'm just twiddling my thumbs and watching the toast burn ...
  Posted by Steve Herman on 2013-05-13 20:18:19
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