Answer
a) 80 hours after it reads 11:00, a 12-hour clock reads 7:00
b) 40 hours after it reads 12:00, it reads 4:00
c) 100 hours after it reads 6:00, it reads 10:00
Work Step by Step
a) 11+80=91=12(7)+7=7:00
b) 12+40=52=12(4)+4=4:00
c) 6+100=106=12(8)+10=10:00