What character should be placed instead of the question mark in order to complete the equation?

Which one of the colored shapes should be placed instead of the question mark in order to complete the sequence?

Which one of the five shapes should be placed instead of the question mark in order to complete the sequence?

It is known each number in the sequence has at least one digit in common with the previous one. What three-digit number should replace the question mark?

Which letter has to be placed instead of the question mark in order to complete the pattern?

Which number is missing in this specially designed barcode on a gallon of milk? Use the logic to reveal the answer.

Should the first question mark be replaced with 2 and the second one with 3, or should it be vice versa?

A couple of glasses can be used as measuring tools to obtain a specified volume of water. What’s the approach?

A book is open exactly in the middle. Some clues are revealed. How many pages the book consists of?

A phone number on a business card is hidden beneath the pen. But it is still possible to reveal it without lifting the pen off. Can you do it?

What should be drawn instead of the question mark in the empty square in order to make the whole pattern complete?

Is it possible to divide the respective matchstick shape into two parts of the same area using just 2 additional matchsticks? Prove it right or wrong.

What comes next in the sequence: what character is most probably not there?

What would be the two final moves in this sequence of changing a pattern of stylized Olympic Rings into a new one?

Blue squares overlap the yellow one producing green regions. Three color areas are not equal. Moving just one square makes three color areas equal: blue = yellow = green. Which square is it?

Convert 2cm into 1cm, using only a pencil, a paper and a ruler with two marks on it. How many points will you have to uncover before accomplishing the goal?