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Find all integers $n$ such that when the clock strikes $n$ o'clock, the acute angle between the hour and minute hands is $60^{\circ}$. Enter your answer as a comma-separated list.

 Feb 5, 2021

Best Answer 

 #1
avatar+79 
+3

I belive the answer is 2, 10 and here is the ex

 

At $n$ o'clock, the minute hand is pointing straight up toward $12$. The hour hand must be $60^{\circ}$ away, either clockwise or counter-clockwise. Since $60^{\circ}$ is $\dfrac{1}{6}$ of a rotation and each full rotation of the hour hand lasts $12$ hours, the hour hand must be pointing $2$ hours in either direction from $12$. The possible times are $\boxed{2{:}00\text{ and }10{:}00}$.

 Feb 5, 2021
 #1
avatar+79 
+3
Best Answer

I belive the answer is 2, 10 and here is the ex

 

At $n$ o'clock, the minute hand is pointing straight up toward $12$. The hour hand must be $60^{\circ}$ away, either clockwise or counter-clockwise. Since $60^{\circ}$ is $\dfrac{1}{6}$ of a rotation and each full rotation of the hour hand lasts $12$ hours, the hour hand must be pointing $2$ hours in either direction from $12$. The possible times are $\boxed{2{:}00\text{ and }10{:}00}$.

AnswerMachine Feb 5, 2021
 #2
avatar+118588 
0

Looks good, AnswerMachine   !!!!

 

 

cool cool cool

CPhill  Feb 5, 2021

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