New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Three streetlights flash together. Each of them then

    flashes after 0.35 seconds, 0.2 seconds, and 0.105 seconds respectively. After how many seconds will they all flash together again?
    A 2.4 Correct Answer Incorrect Answer
    B 1.6 Correct Answer Incorrect Answer
    C 4.2 Correct Answer Incorrect Answer
    D 3.6 Correct Answer Incorrect Answer

    Solution

    0.35,   0.2,    0.105 multiplied by 0.001. 350,200,105 LCM of 350,200,105=4200 4200 × 0.001=4.2 =4.2

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