Brain Out Level 58

Overview

The prompt "Please write down the correct answer" shows a number pattern: 1 + 2 = 21, 2 + 3 = 36, 3 + 4 = 43, and then 4 + 5 = ? with an input field and an OK button. The equations look like a sequence puzzle with a hidden rule, and players will try to derive a formula. The trick is that the pattern is fake — you should just add normally.

• Difficulty: Regular
• Estimated moves: 2

Step-by-Step Solution

1. Read the three given equations: 1 + 2 = 21, 2 + 3 = 36, 3 + 4 = 43. Try to find a rule.
2. You will not find one that fits all three consistently. The first digit of each output is the second addend, but the second digit is inconsistent (1, 6, 3). There is no clean formula.
3. Ignore the pattern entirely. The actual arithmetic for the last line is just 4 + 5 = 9.
4. Tap the yellow input field and type 9.
5. Tap the blue OK button. The green check appears and the congratulations message says "Now you've figured it out!"

The three example equations look like a pattern puzzle: 1+2=21, 2+3=36, 3+4=43. Try to find a rule, and you will notice that the output digits do not follow any consistent formula. The first digit is the second addend, but the second digit jumps around.

Ignore the pattern entirely. The last line is a normal addition: 4+5=9. Tap the input field, type 9, and press OK. The game accepts 9 immediately and pops the message Now you've figured it out, confirming that the examples were misdirection.

Do not try to invent a formula. The three given equations are deliberately inconsistent. Just compute 4 plus 5, which equals 9. Tap the yellow input field, type 9, and press OK. The green check appears immediately. If you type any two-digit number, the level rejects it.

Strategy & Reasoning

The puzzle is a misdirection. The three example equations are deliberately chosen to look patterned without actually being patterned, so players burn time searching for a rule. But the prompt says "Please write down the correct answer," and the last line is a normal addition: 4 + 5 is 9. The game does not actually verify a hidden formula; it just wants you to type the sum. The earlier equations are nonsense and should be ignored. This is a common Brain Out trick: the more complicated the setup, the simpler the answer.

Many players get stuck on this level because they are over-prepared for a hard pattern. The three example lines are deliberately chosen to look like they follow a rule, but the rule is fake. The game is testing whether you will trust your own arithmetic instead of inventing complexity. If you find yourself writing formulas on paper, stop and just add 4 plus 5. The answer is a single digit, and the input field accepts only that digit. This is one of the shortest levels in the batch once you see the trick.

Tips & Common Mistakes

• Do not waste time deriving a formula from the first three lines. There is no consistent rule.
• Do not concatenate digits or multiply. The answer is a single digit, not a two-digit number.
• Do not type 45 or 90 or anything patterned. Just type 9.