What is the Surname of Barbie Doll?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

You need to remove two matchsticks to make the below equation true. Can you do it ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

Can you Find and name the hidden bird in the picture below ?