Thus, light bulb 25 will be flipped by persons 1, 5, 25, so it will be flipped 3 times, which is odd and since initially, all bulbs were “off”, now light bulb 25 will be “on”.(ii) Light Bulb 12 will be flipped by persons 1, 2, 3, 4, 6, 12 whose person numbers are factors of 12.(i) Light Bulb 10 will be flipped by persons 1, 2, 5, 10 whose person numbers are factors of 10.In other words, light bulb j will be flipped by all people whose for person number i is a factor of j, Thus, a light bulb j will be flipped by all persons for whom j is a multiple of their person number.From the above observations, we can say that person i will flip light bulbs which are multiples of i,.Similarly, Person 1000 flips the light bulb 1000, which is a multiple of 1000.Person 3 flips the light bulb 3, 6, 9, … which are multiples of 3.Person 2 flips the light bulb 2, 4, 6, … which are multiples of 2.Person 1 flips the light bulb 1, 2, 3, … which are multiples of 1.What is the status of light bulbs 25, 93, 576, 132, 605, 26, 45, 37, 36 after all people have flipped their respective light bulbs? Is there a general solution to predict the status of a light bulb? How many light bulbs are on after all 1000 people have gone by? Person 1 goes flipping light bulb 1, 2, 3, 4, … person 2 then flips 2, 4, 6, 8, … person 3 then 3, 6, 9, … etc until all 1000 persons have done this. There are 1000 light bulbs and 1000 people. Puzzle 8 | (Find the Jar with contaminated pills).Puzzle 4 | (Pay an employee using a gold rod of 7 units ?).Puzzle 5 | (Finding the Injection for Anesthesia).Puzzle 3 | (Calculate total distance travelled by bee).Puzzle 1 | (How to Measure 45 minutes using two identical wires?).Seating arrangement of n boys and girls alternatively around a round table.Seating arrangement of N boys sitting around a round table such that two particular boys sit together.Area of squares formed by joining mid points repeatedly.TCS DIGITAL PUZZLE | Lateral Thinking 2.
Puzzle | Minimum planes to go around the world.Puzzle | 1000 light bulbs switched on/off by 1000 people passing by.Puzzle | Minimum number steps to weigh 1 kg rice with 1gm weight.Puzzle | Can 2 persons be with same number of hairs on their heads?.Puzzle | Number of Sheets to be turned so that Prime Number has a Vowel on the other side.Puzzle | Toggling CCTV cameras in a museum.Puzzle | Eliminating Virus from a Computer Network.ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.