Riddle 

Bubba invited Beavis and Butthead to his house for a barbeque. Since Bubba's barbeque is only capable of handling two hamburgers at once, he wonders how he can cook three hamburgers at once, he wonders how he can cook three hamburgers in the shortest amount of time. It takes five minutes fro each side of a burger to cook. Therefore, in ten minutes two will be cooked, and another ten minutes will be needed to cook the third burger. Butthead says all three can be cooked i just 15 minutes. How?

Answer 

 Butthead's solution is to rotate the three burgers. If the three burgers are 1,2 and 3 with sides A and B for each, the first five minutes sides 1A and 2A are cooked. The second burger is put aside and for the next five minutes, 1B and 3A are cooked. The first burger
is now done and in the final five minutes, 2B and 3B are cooked.

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