Two neon lights are turned on at the same time. One blinks everys 4 seconds and the other blinks every 6 seconds. In 60 seconds how many times will they blink at the same time

Question

mrnood · Answer

light 1 : 4 8 12 16 20...24...
light 2: 6     12      18   24

etc.

anonymous · Answer

The answer choices are 4 times or 5 times

campbell_st · Answer

find the common multiples of 4 and 6  up to 60

then count the common multiples... that is how many times they will be on together

anonymous · Answer

Okay thanks

anonymous · Answer

Okay so the next one is one tour leaves every 8 minutes and other leaves every 10 minutes i do the same thing ?

anonymous · Answer

Okay so the next one is one tour leaves every 8 minutes and other leaves every 10 minutes i do the same thing ?

anonymous · Answer

Its asks how often the tours leave at the same time

campbell_st · Answer

that's correct multiples of 8 and 10

anonymous · Answer

Really ? The answer choices are 20 mins or 40 mins

anonymous · Answer

Oh i got it Thanks for the help