Find the next number in the sequence

12, 20, 40, 72, 116, 172 ?

* This question was asked in Intel

Can you count the number of triangles in the figure below ?

Three sisters are identical triplets.
=> The oldest(in minutes) is aishwarya and she always speaks the truth
=> Next to aishwarya is kareena and she always lies.
=> The youngest of three sister is katrina and she sometimes lies and sometimes tells the truth.

Salman, an old friend of the sisters visited them after a long time and did not recognize them.
=> Salman asked the sister that was sitting on the left, 'Which sister is in the middle of you three?' and the answer she received was, 'Oh, that's aishwarya.'
=> Salman then asked the sister in the middle, 'What is your name?' The response given was, 'I am katrina'
=> Salman turned to the sister on the right, then asked, 'Who is that in the middle?' The sister then replied, 'He is kareena.'

Salman got confused.
She had asked the same question three times and received three different answers.

Who was who ?

There are many instance in a day when minute needle and hour needle of a clock comes in a straight line.

How many time ?

A famous mathematician is walking in the road , suddenly he say a beautiful girl.
So he asked her "what your name girl ?"
She recognize him as a famous mathematician and replied him that her name is hidden in the date "19/09/2001"

What was the name of the girl ?

In a rainy season , 10 fat girl having a small umbrella for all of them.
The umbrella is too small to accommodate all 10 girls, yet not a single girl got wet.

Why ?

Can so solve the rebus problem by determining what does it says ?

COME TABLE TABLE TABLE TABLE

I am a formed by ten letters.
1st 4 letters have the power to rule,
We can next 4 letters.
Next 3 letters represent a lady.
I can fly as well.

What am I searching for?

Can you find the correct number which should replace the question mark in the picture below

What does this rebus means ?

identXQQQQQME