What has 13 hearts but no other organs?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

No matter how little or how much you use me, you change me every month. What am I?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

Can it be possible to build a house that has all its four walls facing towards the South?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

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

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?