How many times can you subtract the number 5 from 25?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

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 ?

I cannot talk, but I always reply when spoken to. What am I?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

What does below pictogram mean?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Which number should replace the question mark?

If you say my name, I will no longer exist. What am I?