Colored bulbs
Number Theory
Level
1
Three bulbs red, blue and green blink after every 1, 2 and 3 seconds respectively. Find the minimum time (in seconds) after which they will blink together if they are switched on at the same time.
The answer is 6.
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1 solution
Since 1,2 and 3 have no common dividers the answer is the smallest common multiple 6.