There are many puzzles and brainteasers that seem easy but are actually very hard to solve. However, sometimes it’s the opposite: we overthink and try to be very logical without paying attention to obvious things.
Bright Side made a list of 12 puzzles that will be great brain training for you. Keep in mind that it’s hard to simplify things and very easy to complicate them.

6. You can’t answer “no“ to the question ”Are you alive?"
5. You need to put a decimal point between 4 and 5.
4. The right answer is that he is sitting on your lap.
3. 1 + 17 — 3 = 9 + 6
2. Row 6, column 4.
1. The right triangle is tilted to the left.