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

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

What has many teeth, but cannot bite?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

What is full of holes but still holds water?

10+10 and 11+11 can give you the same answer.

Explain how?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

The more you take me, the more you leave me behind.
Who Am I?