Question

8. A buzzer beeps for 4 seconds then stops for 2 seconds.
A light turns on for 4 seconds then off for 6 seconds.
The buzzer and light were started at the same time and repeat their cycles endlessly.
How many times per minute do they start their cycles together?

Answer 1

2 times

Answer 2

once at the beginning of each minute, and once at the 30 second mark

Answer 3

are you sure sounds wrong....

Answer 4

first one has the cycle of 6 seconds, second one 10.

Answer 5

obviously they start together. second one increases by 10 and 6 becomes a multiple of 10 at 30, 60, 90, 120, ...