There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one goes and lights up every bulb. The second one goes and switches off all the even-numbered bulbs - second, fourth, sixth... and so on. The third one goes and reverses the current position of every third bulb (third, sixth, ninth? and so on.) i.e. if the bulb is lit, he switches it off and if the bulb is off, he switches it on. All the 100 strangers progress similarly.

After the last person has done what he wanted, which bulbs will be lit and which ones will be switched off?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

Do You See It?

What is the coolest letter in the alphabet?

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

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

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

You have 1023 apples and 10 bags. You have to distribute these apples in these 10 bags in any way you choose. But when I ask for a certain number of apples you have to give them in terms of bags without transferring the apples from other bags. How do you distribute the apples?

What does a man do only once in his lifetime, but women do once a year after they are 29?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?