By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

A crime was committed at baker street. Ibrahim Dakota who was shot in the stomach was the main suspect. Sherlock questioned the suspect. The conversation started as:
Sherlock: What's your story, Ibrahim?
Ibrahim: I was walking around baker street and suddenly a man from the back shot me. I ran as fast as I could to save my life".
Sherlock: That is enough (and ask the police to arrest him).

Why does Sherlock think he is the murderer?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

If eleven plus two equals one, what does nine plus five equal?

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

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

The more it dries, the wetter it becomes. Can you tell what it is?

I add 5 to 9 and get 2. The answer is correct, so what am I?