Complete the table series riddle by finding the number that can replace "??".

You need to arrange three 7 and mathematical symbols to form number 1?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

Can you count the number of squares in the figure below?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

What does this rebus means ?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

Can you count the number of triangles inside a triangle?

What do you answer even though it never asks you questions?