# What is the answer to the light bulb Riddle?

## What is the answer to the light bulb Riddle?

Here it is: If the light is on, then switch number 2 controls it. If the light is off, then go and feel the bulb with your hand. If the bulb is hot, then switch number 1 controls it, and if the bulb is cold, then switch number 3, the one you did not touch, controls it.

How many light bulbs are turned on at the end?

Let’s realize what we discovered. If there’s no randomness, then we’ll get 10 light bulb that are turned on in the end. If there’s a 50–50 chance to press the switch, then we’ll get 50 light bulbs that are turned on.

### Is there such a thing as a 2 way bulb?

Bluefire Lighting – 2-Way LED Light Bulb Switchable Lighting, 60 Watt Equivalent (15W) / 8 Watt Equivalent (1.5W) Night Light, A19 – Warm White 2700K – 2 Pack.

Which switch belongs to which bulb?

The bulb that is on is the only switch that is on. The bulb that is off but hot, is the switch that has been turned off. The bulb that is off and cold is the third switch.

## How high can you count with three light bulbs?

With 3 light bulbs, we get 8 combinations representing the numbers from 0 to 7.. With 4 light bulbs, 16 combinations representing the numbers 0 to 15.

What is the final state of Bulb No 64 and how many of the light bulbs are illuminated after the 100th person has passed through the room?

And how many of the light bulbs are illuminated after the 100th person has passed through the room? Right first the answers: Light Bulb 64 is on. The total number of bulbs which are on including #64 is 10.

### How do you know if a light bulb is 3-way?

The way to tell if a lamp is 3-way is that there is an extra contact in the form of a metal tab at the bottom that lines up with an extra contact area on a 3-way bulb. Regular lamps only have two contacts inside the socket, one at the bottom and the other the threaded shell wher you screw your bulb.

Do they make 3-way light bulbs anymore?

Certain compact fluorescent lamp bulbs are designed to replace 3-way incandescent bulbs, and have an extra contact and circuitry to bring about similar light level. In recent years, LED three way bulbs have become available as well.

## How do I know if a light bulb will fit?

If you choose the wrong base the bulb will not fit, you should never force the bulb into the base of your fixture it should fit very easily. To find the size of you base you need to measure the width of your base in mm, the number you get is the size of your base.

Can I put LED bulb in incandescent fixture?

Can You Put LED Bulbs in Halogen and Incandescent Fixtures? If everything fits and is the correct voltage, yes, you can easily swap all your halogen and incandescent bulbs in your fixtures with LED replacements. The fitting of the bulb base is the first thing you need to keep in mind.

### How to switch three light bulbs in a room?

The consensus of opinion seems to be this is the best answer: • Switch on switches 1 & 2, wait a moment and switch off number 2. • Enter the room. Whichever bulb is on is wired to switch 1, whichever is off and hot is wired to switch number 2, and the third is wired to switch 3. Obviously any combination would work.

Where are the 3 switches and 3 bulbs?

3 Switches and 3 Bulbs You are standing in a hallway next to 3 light switches that have been switched off. There is another room down the hallway with 3 light bulbs – all are incandescent light bulbs and each light bulb is operated by one of the switches in the hallway.

## Where are the 3 light bulbs in the hallway?

You are standing in a hallway next to 3 light switches that have been switched off. There is another room down the hallway with 3 light bulbs – all are incandescent light bulbs and each light bulb is operated by one of the switches in the hallway. The door to the room is closed and you cannot see the light bulbs from the hallway.

Which is the best 3 way light bulb?

The top-selling product within Light Bulbs is the Feit Electric 50/100/150-Watt Equivalent A21 CEC ENERGY STAR 90+ CRI 3 Way LED Light Bulb, Daylight. Is there a 1 product available in Light Bulbs? Yes, we carry a 1 product in Light Bulbs.