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    IBEasyNumber7–9

    Two buses leave the same stop together at 08:0008{:}00. One runs every 1212 minutes and the other every 1818 minutes. After how many minutes do they next leave together?

    Dois autocarros partem juntos da mesma paragem às 08:0008{:}00. Um passa a cada 1212 minutos e o outro a cada 1818 minutos. Ao fim de quantos minutos voltam a partir juntos?

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    Solution

    Step 1 of 3

    1. 1.12=22×312 = 2^{2} \times 3 and 18=2×3218 = 2 \times 3^{2}