Back to School Week - Monday: Maths!

And here is the example for the Monday - Maths!
How can you make the following equation true by drawing only one straight line: 5+5+5=550 Can you figure it out?
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This post has been edited 2 times, last edit by "Liusaidh" (Sep 25th 2019, 12:14pm)
Somewhere in China there used to be a doll factory.
The owner had 5 machines making dolls and every 5 days they made 5 dolls.
The market was growing, people were waiting in queue for his dolls.
So he decided to get more machines. He bought 495 more of them.
How long would it take his machines to make 500 dolls now?
The owner had 5 machines making dolls and every 5 days they made 5 dolls.
The market was growing, people were waiting in queue for his dolls.
So he decided to get more machines. He bought 495 more of them.
How long would it take his machines to make 500 dolls now?
Somewhere in China there used to be a doll factory.
The owner had 5 machines making dolls and every 5 days they made 5 dolls.
The market was growing, people were waiting in queue for his dolls.
So he decided to get more machines. He bought 495 more of them.
How long would it take his machines to make 500 dolls now?
5 days
And correct

the answer was 7 horses and 4 men.In a stable there are men and horses. In all there are 11 heads and 36 feet. How many men and how many horses are in the stable?
I am handing out equal judgment to everyone at an affordable rate, call me Fix Price,
When the king dies, make sure his grave is King-Size.
When the king dies, make sure his grave is King-Size.
You're in caves, year 386 and the score is 150-150 and you have 5 red and 3 green crystals in your backpack. All of your teammates are in blue cave, the question is: how many blue crystals should each teammate drop to finish the battlefield?
I am handing out equal judgment to everyone at an affordable rate, call me Fix Price,
When the king dies, make sure his grave is King-Size.
When the king dies, make sure his grave is King-Size.