Why is a river so rich ?

Find the smallest sentence with all the English alphabet.

What word is pronounced the same if you take away four of its five letters?

What number divided by 4 is the same as that number minus 4?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

Can you write down eight eights so that they add up to one thousand?

What has many keys but can’t open a single lock?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

Make a sentence consisting of three words that have the whole alphabet.