Antoine has been given 3 Hourglasses H
1, H
2, and H
3 which are respectably able to measure out precisely 11 minutes, 15 minutes, and 17 minutes.
• Antoine is asked to measure out precisely 23 minutes, and he is permitted to use any 2 of the 3 hourglasses to perform this task.
What choice of 2 hourglasses will enable Antoine to achieve the said objective in a minimum number of steps?
Provide valid reasoning for your answer.
Start 11 and 17.
When the 11 runs out, the timed 23 mins starts.
17-11 =6.
When 17 runs out, turn it over.
17+6=23.
|
Posted by broll
on 2024-07-15 09:22:44 |