If 21x = 79x, what is the value of x?

How many times do a clock's hands overlap in a day ?

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

If eleven plus two equals one, what does nine plus five equal?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What you cannot hold but it is yours?

Can you identify the famous TV character from the rebus below?

It belongs to you, but other people use it more than you do. What is it?

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?