What happened when the wheel was invented?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

You visit a home for specially-abled children on the occasion of Christmas where you meet with 50 children. You have a box of chocolates containing 50 chocolates exactly.

What if you were asked to one chocolate to each child in a manner that one chocolate still remains in the box? Is it possible?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

Which part of London exists in France as well ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?