You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

If eleven plus two equals one, what does nine plus five equal?

Find the hidden panda in the image below.

What can go up a chimney down, but can’t go down a chimney up?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?