John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

If 21x = 79x, what is the value of x?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Can you find a five letter word that is left with only two letters if one is removed?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

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?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?