Asked by Aisha
A blue light every 30seconds. A red light blinks every 40seconds. If both lights blink at exactly 1:00pm, at what time will they blink at the same time again?
Answers
Answered by
Ms. Sue
The least common multiple of 30 and 40 is 120.
30, 60, 90, 120
30, 80, 120
1:00 + 120 seconds = ?
30, 60, 90, 120
30, 80, 120
1:00 + 120 seconds = ?
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