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

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

In the image given, you can find several triangles. Can you count them all?

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

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?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Can you quickly find which two matchstick figures are identical?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?