Suppose a small bank has one teller and customer transactions take 10 minutes on average. With 5.8 customers arriving per hour, what is the expected wait time? What would it be if you added a second teller?

Toby likes indigo but not red. He likes onions but not turnips. He likes forms but not shapes.

According to the same rule, does he like tomatoes or avocados?

It’s raining at midnight. Will there be sunny weather in 72 hours?

A man owed his friend $63 and repaid him the exact amount in cash without using coins or $1 bills (no online transfers, checks, credit cards or any other tricks) and without requiring change. How did he do it?

A plane with 50 passengers crashes and everyone is killed, but there were only 49 bodies. How is this possible?

If two hours ago it was as long after one o’clock in the afternoon as it was before one o’clock in the morning, what time is it right now?

You have 12 black socks and 12 white socks mixed up in a drawer. You’re up very early and it’s too dark to tell them apart. What’s the smallest number of socks you need to take out (blindly) to be sure of having a matching pair?