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

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

When can we add 2 to 11 and get 1 as the correct answer?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

I have no life, but I can die. What am I?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

What does a man do only once in his lifetime, but women do once a year after they are 29?

A family is trapped in a jungle. There is a bridge which can lead them to safety. But at one time, the bridge can only allow two people to pass through. Also, all of them are afraid of the dark and thus, they can't go alone.

Father takes 1 minute to cross, the mother takes 2 minutes, the son takes 4 and the daughter takes 5 minutes. While crossing the time taken will be according to the slower one. How can they all reach the other side in the minimum possible time?