Which one of the following must be true if Greg is still on board both when the van reaches Los Altos and when it rea...

Michelle on July 9, 2020

Response to video explanation

Rather than trying each option, couldn't you deduce that since L and S have to be the first two stops and R can't get off before M, R has to get off 3rd or 4th, therefore S comes before R ie R is on board when the van reaches S?

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Shunhe on July 9, 2020

Hey @mfujii, that makes sense to me. And yes, that's a better strategy than trying each option out, since that'll definitely save time. Good job!