By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

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

The dirtier I get, the whiter I look. Who am I?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

What is more useful when it is broken?