Can you find the missing piece of the Porsche?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Solve the counting riddle by identifying the number of triangles in the given picture.

Can you make a fire with just a single stick?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

With the help clues provided in the image, can you find the 5 digit key?