What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

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?

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

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

Can you decipher the below rebus?

PBLUESAISNUERSES

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?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

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