Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

How is the moon similar to a dollar?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

Using eight eights and addition only, can you make 1000?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?