Replace the question mark with the correct number.

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

They are three errirs in this question. Can you find them?

Can you count the number of quadrilaterals in the picture below?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What can you hold in your right hand, but never in your left hand?