Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Why are televisions attracted to people?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

What jumps when it walks and sits when it stands?

Move four matchsticks to the below square to form three squares?

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?