By what process could you make a 'Tea-Table' into food?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

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?

Solve the mathematical equation in the picture below.

What has a ring but no finger?