I am an odd number. Take away a letter and I become even. What number am I?

What begins with T, ends with T, and has T in it?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

What brings you down but never up?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

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

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

Count the squares in the matchstick puzzle below?

A Monkey, a squirrel, and an Eagle are racing to the top of the mango tree. Assuming all these animals are in perfect shape, Which animal will reach to Banana first?