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13 June, 23:06

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. 14 June, 01:30
    0
    They will blink together every 30 seconds.
  2. 14 June, 02:33
    0
    Every 30 seconds they blink together
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