Find the next number in the sequence

1, 2, 6, 21, 88, __?

I look at you, you look at me I raise my right, you raise your left. What am I?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What is the next number in this matchsticks series riddle?

As shown in the picture below, we can see a boy hanging on the tree branch to save his life. There are various ways in which he can die like1. A snake hanging toward the right waiting to bite the boy.2. A roaring Lion near the tree.3. Two crocodiles are ready to attack if the boy reaches near water. The tree is chopped to some extent, so can fall as if he moves a lot. Can you give this boy an escape plan?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

Who has married many women but was never married?

How many triangles can you find in this given picture?

In the image given, you can find several triangles. Can you count them all?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?