Card 18
You're in a hurry.  You pull into a market to get a soda.  You leave your vehicle running because it will only take a minute and it's in sight. Is this legal?  NO. It is ILLEGAL to leave your motor vehicle engine running and unattended.

Card 32
When traveling on a non-arterial highway through a residential zone in an urban district, what is the speed limit?
It is the POSTED SPEED LIMIT.  Each municipality within Missouri sets its own speed limits.

Card 33

Is it legal, when driving in a business district, to enter a public street from a private driveway without stopping first? Yes, it is LEGAL to enter a public street from a private driveway without stopping first IF you first YIELD to ALL cross traffic - pedestrians, bicyclists, motorists.