Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you start the fire using two pieces of wood?

Find the next number in the series below.

6 18 270 72090 ?

There is a place where if I stand up straight, I will still be considered sideways.

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

How can you drop a raw egg from a height onto a concrete floor without cracking it?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15