Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

It was a dark stormy night and a couple were in a car driving madly to a city. The car broke down and the husband had to go get help from someone who spoke his language. He was afraid to leave his wife alone in the car so he locked the car before leaving. When he came back, the car was in the same state as he had left it but his wife was dead, there was blood on the floor and there was a stranger in the car. What happened?

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

I look at you, you look at me, I raise my right, you raise your left. What am I?

What does this rebus means ?

PROG WORKRESS

Can you find the six hidden animals in the picture below?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?