What is the next number in this series?

4,12,84,3612....

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Can you spot the hidden girl in the picture below?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Take one out and scratch my head, I am now black but once was red. What am I?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.