While we are trying to keep track of the things happening around us, scientists conducted a study to find out how much you should spend on a wedding to make sure the marriage is happy. This secret information and a series of other amazing facts can be found in our article.

Bright Side offers you a series of interesting facts that can make the world even more curious. And at the end of the article, there is a bonus that will help you multiply numbers very easily!

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In Syracuse, US, there is a street light with a reversed order of the lights: green on top and red on the bottom. This is all about politics: the green light that is a symbol of Ireland can’t be under the red light that symbolizes Great Britain.

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The first sushi appeared in the 8th century, but it was different from what we know today. Fish was covered with fermented rice and salt and left for several months. Fermented rice didn’t let the fish spoil. After some time, the rice was thrown away and the fish was eaten. Only in the beginning of the 19th century did sushi become how we know it today.

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Bonus: the tables of 6, 7, 8, and 9

If it’s hard for you to memorize multiplying tables, there is shortcut you can use that works with 6, 7, 8, and 9.

First, ascribe the values to the fingers.

Put together the fingers whose values you need to multiply.

Now count the touching fingers and the ones below them. In our example, the touching fingers are 7 and 8, so there are 5 fingers below them. This will be tens (50 in our example.)

Multiply the remaining numbers. In our case, 3 fingers on one hand and 2 on the other (3×2 = 6.)

Count the result (50 + 6 = 56.)

We’re sure you know some interesting facts about the world around us! Share your knowledge with us in the comments section below!

Preview photo credit depositphotos Illustrated by Xenia Shalagina for BrightSide.me