Brain Test Level 299 Walkthrough & Answer

## Question **Brain Test Level 299:** Balance this chemical equation: _H2 + _O2 = _H2O ## Answer 2H2 + O2 = 2H2O. You need 2 in front of H2 and 2 in front of H2O. ## Step-by-Step Walkthrough Balance hydrogen: 2H2 gives 4H on the left. Balance oxygen: O2 gives 2O on the left. 2H2O on the right gives 4H and 2O. Balanced: 2H2 + O2 = 2H2O. Here is exactly how to solve Brain Test Level 299: 1. Read the question carefully — Brain Test loves wordplay and misdirection. 2. Look at every element on screen, including the question text itself. 3. Place '2' before H2 and '2' before H2O to balance both hydrogen and oxygen atoms. 4. If you are stuck, remember that Brain Test rewards lateral thinking over logical answers. ## Why It's Tricky Chemistry notation intimidates people who haven't studied it. But balancing equations is just making both sides have the same number of each type of atom — essentially a counting and matching exercise. The scientific notation is the barrier, not the logic. ## Why This Level Is Tricky For difficulty 4, expand your toolkit: try shaking the device, using the volume rocker, covering the camera, or pressing the home button area. Also try dragging seemingly static elements like the level number, score display, or hint button. Brain Test treats everything on screen as a potential puzzle piece at this tier. 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 299: - Reading the question too fast and missing a critical word like 'not', 'biggest', or 'smallest'. - Assuming numbers on screen represent their face value when they might be Roman numerals, binary, or visual patterns. - Skipping the hint system entirely — hints in Brain Test are progressive and often nudge without spoiling.