You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Can you tell a 3D object that has just two surfaces?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

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?

What is wrong in the below Picture?

You need to move three matchsticks to form three squares. Can you do it?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?