Two neon lights are turned on at the same time. one blinks every 4 seconds and the other blinks every 6 seconds. in 60 seconds, how many times will they blink at the same time?

From 1-60, 4 and 6 a few common multiples. Find those multiples, which are
12, 24, 36, 48, 60.
So in 60 seconds, they blink together 5 times.

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )