If it took eight men ten hours to build a wall, how long would it take four men to build it?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

John was piloting a plane behind a car but was never able to overtake it. Why?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

James ordered a fishing rod, priced at $3.56. Unfortunately, James is an Eskimo who lives in a very remote part of Greenland and the import rules forbid any package longer than 4 feet to be imported. The fishing rod was 4 feet and 1 inch, just a little too long, so how can the fishing rod be mailed to James without breaking the rules? Ideally James would like the fishing rod to arrive in one piece!

When we see 2 but call 10?

I am sure no one can have two things for dinner. what are they?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

If six children and two dogs were under an umbrella, how come none of them got wet?