What number should come in place of the question mark below?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What breaks yet never falls, and what falls yet never breaks?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

12345 a famous South Indian actor
567 is a path in jumbled form
8 & 10 are same letters
9 is one among the first six alphabets.
WHO AM I?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

What runs around the whole yard without moving?

Solve the equation in the image by looking at the pattern closely.

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?