My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Can you count the number of triangles inside a triangle?

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

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

Our product and our sum always give the same answer. Who are we?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?