Question 1192709
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(2)  97 = 1 (mod 24).              <U>ANSWER</U>



(3)  9 + 13 = 22 = 10 (mod 12).    <U>ANSWER</U>
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Solved.


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I just explained it yesterday how to find hours on 6-hour, 12-hour and 24-hour clock.


See the links


https://www.algebra.com/algebra/homework/testmodule/testmodule.faq.question.1192649.html


https://www.algebra.com/algebra/homework/testmodule/testmodule.faq.question.1192647.html



Do you expect I will repeat it every day ?