Which is the rope you never skip with?

Can you solve the maths in the below-given picture equation?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

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

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

Using Only Five 5's and any mathematical operator make sum as 37

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

Move three sticks of the spiral below to form a square.