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27 November, 23:54

Sam blinks every 15 seconds and Martha blinks every 10 seconds. They blink together at midnight. How many seconds will pass before they blink together again

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Answers (2)
  1. 28 November, 00:24
    0
    Every 30 seconds they blink together
  2. 28 November, 01:51
    0
    They will blink together every 30 seconds.
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