Think you can predict the output?
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Think you can predict the output? Take a pause with our latest #ACMCoffeeBreakPuzzle. 💬 Leave your solution below. We're tagging the sharpest minds in our Stories! Looking for more puzzles? https://www.acm.org/education/coffee-break-puzzles
@ACM Ok, that was neat. I started with n=10 and guessed the pattern would continue; my hunch was right!
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Think you can predict the output? Take a pause with our latest #ACMCoffeeBreakPuzzle. 💬 Leave your solution below. We're tagging the sharpest minds in our Stories! Looking for more puzzles? https://www.acm.org/education/coffee-break-puzzles
Is this question for the number geeks? Nerds? No; only the "squares" will get it.
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undefined evan@cosocial.ca shared this topic
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Think you can predict the output? Take a pause with our latest #ACMCoffeeBreakPuzzle. 💬 Leave your solution below. We're tagging the sharpest minds in our Stories! Looking for more puzzles? https://www.acm.org/education/coffee-break-puzzles
The answer:
Lockers 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100.
Why?
A locker is visited by every student whose number divides into it. Usually, these students come in pairs, so one opens the door and their partner closes it back. -
The answer:
Lockers 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100.
Why?
A locker is visited by every student whose number divides into it. Usually, these students come in pairs, so one opens the door and their partner closes it back.For example, take Locker 12.
It is visited by students 1 & 12, 2 & 6, and 3 & 4. Since everyone has a partner to "undo" their work, the door ends up closed.
The exceptions are Perfect Squares (like 9, 16, 36).
Take Locker 9: It is visited by 1 & 9 (who cancel each other out) and Student 3. Since 3 times 3 = 9, Student 3 has no partner to close the door back. That "odd man out" leaves the locker open.