What is the coolest letter in the alphabet?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you solve below mathematical equation?

2^1234 - 2^1233

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

A number with an interesting property:

When I divide it by 2, the remainder is 1.
When I divide it by 3, the remainder is 2.
When I divide it by 4, the remainder is 3.
When I divide it by 5, the remainder is 4.
When I divide it by 6, the remainder is 5.
When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
When I divide it by 9, the remainder is 8.
When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.
When I looked for a smaller number with this property I couldn't find one.

Can you find it?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

Why are televisions attracted to people?

Can you find out the number that should replace the question mark with a valid reason?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Can you move 2 matchsticks to form four equal sized squares.