top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one.........?

0 votes
20 views

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?

posted Mar 14 by Akriti

Looking for solution? Promote on:
Facebook Share Button Twitter Share Button LinkedIn Share Button




Similar Puzzles
+1 vote
There are 100 coins placed on a table in a dark room, out of which 20 coins are showing tails and 80 coins..............

There are 100 coins placed on a table in a dark room, out of which 20 coins are showing tails and 80 coins are showing heads. The task is to divide this set of 100 coins into 2 groups (not necessarily same size) such that both groups have the same number of coins showing the tails.

0 votes
There are 100 animals in cages. The first is a monkey, followed by one dog and three pigs. Next is again a monkey...

There are 100 animals in cages.
The first is a monkey, followed by one dog and three pigs.
Next is again a monkey, one dog and three pigs.
Following this order what is the 99th animal?

0 votes
A devotee visits 9 temples when he visits India. All these nine temples have one thing in common – there are 100.......

A devotee visits 9 temples when he visits India. All these nine temples have one thing in common – there are 100 steps in every temple. The devotee puts the Re.1 coin after climbing up every step. He does the same while climbing down every step. At each temple, the devotee offers half of his money from his pocket to god. In this way, his pocket becomes empty after he visits the 9th temple.

Can you calculate the total amount he had initially?

0 votes
You enter a dark room. You have only one match. There is an oil lamp, a furnace, and a stove in the room................

You enter a dark room. You have only one match. There is an oil lamp, a furnace, and a stove in the room. Which would you light first?

...