Multiple choice

One light blinks after every 8 seconds and the other after every 11 seconds.If they blink together now, after what time will they blink together again?

  1. 66 seconds

  2. 88 seconds

  3. 102 seconds

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is an LCM problem. The lights blink together at times that are common multiples of 8 and 11. Since 8 and 11 are coprime (no common factors), their LCM is simply 8 × 11 = 88. So they will blink together again after 88 seconds. Option B is correct.

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