Working out at the gym is great for improving your health and physique, but how often we think of working out our mind or brain? Training our brain to be sharper and more practical can have a multitude of benefits as well. So here are 17 intriguing questions which can really test the aptitude of your brain and the current level of your thought process.

  1. Who are the passengers who aren’t allowed to sit together on a plane?

Among tricky questions to give your brain a workout, The International Air Transport Association or AITA, states that these two passengers shouldn’t be allowed to sit together in the same row in the airplane. Who can these passengers be?

Who are the passengers who aren’t allowed to sit together on a plane

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  1. What could have been the reason behind this so-called “doomsday of Moscow?

In 1445, the people of Moscow thought that the apocalypse was upon them when all the church bells began to ring simultaneously on their own. However, there was an exact account of the same doomsday happening in Kiev in 1091, and once again in 1802 in Moscow. What could have been the reason behind this so-called “doomsday”?

What could have been the reason behind this so-called “doomsday of Moscow

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  1. Why does Burma raise cattle?

This is one among tricky questions that is puzling. In Myanmar (Burma), the locals raise poultry and cattle, but rarely do they ever slaughter them for meat. Instead, they usually sell their animals to the market and other neighboring countries like China and buy meat from the dealers. Why do they engage in such a time and money consuming trade?

Why does Burma raise cattle

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  1. What is tail docking?

Among tricky questions to give your Brian a workout, in Europe, tail docking was once a common practice regardless of the dog’s breed. Why was that?

What is tail docking

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  1. Why does Earth get heavier with this?

 Earth gets heavier and heavier every day. It gains up to 60 tons of what per day?

Why does Earth get heavier with this

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  1. What does countries like Turkey, Egypt and Russia have in common?

Countries like Turkey, Egypt, and Russia share a common feature. What could it be?

What does countries like Turkey, Egypt and Russia have in common

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  1. Why do sub-Saharan African tribes attach pouches full of insects to their legs?

When going hunting at night, some sub-Saharan African tribes attach small pouches full of insects to their legs. Why do they need to do that?

Why do sub-Saharan African tribes attach pouches full of insects to their legs

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  1. Which type of beer did Mexico ban?

The government officials of Tabasco, Mexico, in 1997 decide to reduce growing alcoholism rates by deciding to ban all kinds of beer. Needless to say, that their decision met with strong negative reactions. So, in order to solve this, The Congress of the state came up with one brilliant idea which was to ban the sales of only one type of beer. Which type of beer did they ban?

Which type of beer did Mexico ban

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  1. Why Senators of Swaziland aren’t disturbed

Here is another among tricky questions. Senators in Swaziland are never disturbed while doing THIS during a session of parliament, because the government official might be consulting the great ancestors at that very moment. What is “THIS’ that they do?

Why Senators of Swaziland aren’t disturbed

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  1. Where was the first port in history to charge merchants for using its docks?

In Spain, a port in a small town in Andalusia became the first port in history to charge merchants for using its docks. What was the name of this town?

Where was the first port in history to charge merchants for using its docks

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  1. Where is the world’s shortest river?

The Guinness World Records listed a river in Oregon, United States as the world’s shortest river at 440 feet (130 m). The river’s name starts with the letter ‘D’ and it happens to be the shortest river name ever. What’s the name of this river?

Where is the world’s shortest river

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  1. What water as a substitute for blood plasma in WWII?

According to astronauts, riverbeds look similar to the circulatory system of a living organism from outer space. An interesting observation nonetheless! Coincidently doctors during World War II used THIS water as a substitute for blood plasma. What was that water?

What water as a substitute for blood plasma in WWII

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  1. Color blind people suddenly became popular in military service and the USAF in WWII, why?

 Before 1941, color blind people were never allowed to perform military service in the US Air Force. But, when World War II began, the situation changed and these people suddenly became very popular among all other candidates. What was the reason for this sudden change?

Color blind people suddenly became popular in military service and the USAF in WWII, why

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  1. What is responsible for this common feature of the seabed in some Northern seas.

Long and narrow furrows which are also known as scours or gouges are a common feature of the seabed in some Northern seas. In length they can measure up to hundreds of feet while in depth they can measure nearly 16 feet. What is responsible for such a phenomenon?

What is responsible for this common feature of the seabed in some Northern seas

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  1. Where was the first Christmas tree placed in Europe?

One of the best tricky questions to give your brain a workout. In Europe, the first indoor Christmas trees were placed right there. Where were they placed?

Where was the first Christmas tree placed in Europe

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Here are the answers:

  1. Cats and dogs.
  2. An earthquake.
  3. Because they strictly follow the Buddhist doctrine of ahimsa (causing no harm).
  4. At the time dog owners were taxed according to the length of their dogs’ tails, which is why docking was widely used as a viable method of reducing the tax liability.
  5. Cosmic dust.
  6. They are all located on two continents.
  7. They put fireflies intiny bags to light the way at night.
  8. A cold one.
  9. They sleep.
  10. Tarifa.
  11. D River.
  12. The doctors used seawater to save lives when medical supplies ran out.
  13. Colorblind people were easily able to discover the enemy camouflage since for them it stood out so easily that it didn’t seem much of a challenge for them to spot it.
  14. Icebergs and sea ice ridges.
  15. The tree was hung top down from the ceiling inside the house.