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

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

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 _

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

It is always ahead of me yet I can never see it. What is it?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

A bomb exploded in a room full of married couples and no one died. How?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?