I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

What is the longest word in the dictionary?

What is the next number in the series?

15 29 56 108 208 ?

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

By moving just one matchstick, you need to make the below statement true. Can you do it?

The centre of the third figure is empty. What digit should fit inside?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Can you count the number of triangles inside a triangle?

Whats the next number in the below number sequence pattern.