How many triangles can you find in this given picture?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

What is the next number in this series?

4,12,84,3612....

It is always ahead of me yet I can never see it. What is it?

What has a bottom at the top?