Brain Test Level 220 Walkthrough & Answer
Level 220★★★★★
Guide by LevelWalks
Brain Test: Tricky Puzzles Level 220 sits about 73% through the game's 300-level run — late enough that the obvious patterns no longer work, early enough that the mechanics still favor lateral thinking.
## Question
**Brain Test Level 220:** Which switch controls the lightbulb?
## Answer
Turn each switch on, wait, then off. Touch the bulbs — the warm one was controlled by the switch you turned on and off. The still-lit one is the current switch.
## Step-by-Step Walkthrough
Three switches, one light. The classic logic puzzle: turn switch 1 on for a minute, turn it off, turn switch 2 on, then check. If the light is on, it's switch 2. If off but warm, it's switch 1. If off and cold, it's switch 3.
Here is exactly how to solve Brain Test Level 220:
1. Read the question carefully — Brain Test loves wordplay and misdirection.
2. Look at every element on screen, including the question text itself.
3. Use the heat test: turn one switch on then off, turn another on, then check if the bulb is on, warm, or cold.
4. If you are stuck, remember that Brain Test rewards lateral thinking over logical answers.
## Why It's Tricky
This is a classic logical reasoning puzzle that predates Brain Test by decades. The insight is using HEAT as information — an invisible property that persists briefly after the light is turned off. It requires thinking about physics, not just visual on/off states.
## Why This Level Is Tricky
You're in the advanced zone now. These levels frustrate even veteran Brain Test players, so getting stuck is completely normal. The key insight for difficulty 4 is that the answer often involves doing something the game hasn't explicitly asked you to do. Think about what's possible, not just what's prompted. Late-game levels (151-300) frequently require device interaction — tilting your phone, using multiple fingers, shaking the device, or manipulating screen elements outside the puzzle area. Think beyond the touchscreen for these multi-step solutions.
## Common Mistakes
Players frequently make these errors on Level 220:
- Tapping the most obvious on-screen element without reading the full question first.
- Ignoring the question text as a potential interactive element — in Brain Test, words on screen can often be dragged, tapped, or used as part of the solution.
- Giving up too quickly instead of experimenting with device gestures like tilting, shaking, or using multiple fingers.
Tips
- Brain Test rewards questioning fundamental assumptions about how puzzles work.
- If the obvious answer seems too easy, it probably is — look for the twist.
- Remember: Brain Test Level 220 has a difficulty rating of 4/5 — it requires advanced lateral thinking.
FAQ
- How do I solve Brain Test Level 220?
- Turn each switch on, wait, then off. Touch the bulbs — the warm one was controlled by the switch you turned on and off. The still-lit one is the current switch. This is one of the trickiest puzzles in Brain Test because it requires you to think outside the box rather than using straightforward logic.
- Why is Brain Test Level 220 so hard?
- Brain Test Level 220 ("Which switch controls the lightbulb?") tricks players by using misdirection. This is a classic logical reasoning puzzle that predates Brain Test by decades.
