What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Give it food and it will live; give it water and it will die.

Can you Find and name the hidden bird in the picture below ?

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?

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