Every day, Jack and Jill agree to meet at a certain time at the nearby bus interchange, where buses depart at equal periods of time. Once, Jill came 15 minutes later and Jack saw 6 buses depart. On a second occasion, Jill came 26 minutes later, and Jack saw 8 buses depart. On another occasion, Jack came 43 minutes later than Jill. How many buses departed the interchange while Jill was awaiting Jack?(adsbygoogle = window.adsbygoogle || []).push({});

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I'm quite confused by this question at the moment. I've got to run now, and I may try and post my attempt a bit later, but I doubt I'm heading in the right direction.

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# Approximation math problem

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