Can you write down eight eights so that they add up to one thousand?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

How can you leave a room with two legs and return with six legs?

How many triangles are there on the puzzle below?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What is the next number in the series?

15 29 56 108 208 ?

Can you find the hidden animal in the picture below?

How can one talk without saying a single word?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?