Question 166271
FACTORING EACH OPF THE TIMES IN MINUTES WE THEN FIND THE LOWEST COMMON DENOMINATOR.
45=2*2*2*5
120=2*2*2*3*5
75=3*5*5
NOW WE HAVE 2*2*2*3*5*5=600 MINUTES AFTER 8:35 THEY WILL ALL FLASH.
600MIN.=10 HOURS.
THUS THE TIME WILL BE 8:35 PM+10:00=6:35 AM.