Can you count the number of rectangles on a chessboard?

On a beautiful Sunday morning, You ordered a hot tea to your hotel room and suddenly you remember an important thing that needed to be done right now will take around 3 minutes to complete.
Like most people you like your tea to be hot while drinking so, when should you pour cream in the tea?
1. straight away
2. Just people, you drink the team
3. Its does not matter

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

Find the value of "a" by solving the maths equation in the picture below:

The more it dries, the wetter it becomes. Can you tell what it is?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Why do we preferably have round manhole covers and not square ones?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?