What does the below rebus riddle means?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What has one eye, but can’t see?

An apple seller is hosting a competition. He offers 1000 apples and 10 boxes to the people who pass by. The challenge is to put those 1000 apples in the 10 boxes in such a manner that if he asks for any amount of apples, the person can directly give him the boxes or a combination of boxes. If the person can do it, he promises to give a thousand apples for free.

If you happen to pass by the apple seller, will you be able to win a thousand apples?

Replace The Question Mark Below With the Correct Number.

2 {38} 3
4 {1524} 5
6 {3548} 7
8 {????} 9

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

What is the word or phrase below?
R | E | A | D

What is the word or phrase?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?