Find the missing letter in the last circle logically in the given below picture.

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

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

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

What work can one never finish?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

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 _

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)