*1k views**119 ratings**6 saves*

**Question: **Suppose you're on a game show, and you're given the choice of three doors: Behind one door is a sports car; behind all of the others is bicycles. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 2, revealing a bicycle. He then says to you, "Do you want to pick door No. 3?" Is it to your advantage to switch your choice?

*4k views**280 ratings**23 saves*

**Question: **Mr. Smith has 4 daughters. Each of his daughters has a brother.

How many children does Mr. Smith have?

*3.3M views**4187 ratings**19 saves*

**Question: **When is 99 more than 100?

*79.2k views**79 ratings**0 saves*

**Question: **Nathan has math 4 times a week. If he has math 8:00 Monday, 9:20 on Tuesday, 10:40 on Wednesday, and 1:20 on Friday, when does Nathan have math on Thursday?

*3k views**202 ratings**14 saves*

**Question: **You have a glass of water that looks about half full. How can you tell, only using the glass of water itself, if the glass is half full or not?

The glass is a right cylinder.

*3k views**292 ratings**9 saves*

**Question: **How can you add 8 8's to make 1000?