If you’re someone who enjoys flexing your brainpower, this clever 4-digit lock puzzle is just the kind of challenge you’ll love. It’s the perfect test of logic, observation, and patience. At first glance, it might look simple, but don’t be fooled—this one can really mess with your head if you’re not paying close attention.
So, are you ready to take on the lock and figure out the secret code? Let’s dive in!
Why Puzzles Like This Are Great for Your Brain
Solving logic puzzles isn’t just a fun way to pass time. They train your brain to spot patterns, think critically, and stay mentally sharp. Plus, the feeling of satisfaction when you finally crack the code? Absolutely unbeatable. But most people go wrong not because they’re not smart enough—but because they overlook the small clues that actually matter.
Let’s go step-by-step, analyze the clues, and see if you can crack the code before scrolling to the solution.
The Puzzle Setup
You’re given five guesses for a four-digit lock, and each one comes with a helpful hint. Here’s what the puzzle tells us:
- 8951 — Two digits are right, but both are in the wrong place
- 2169 — Two digits are right; one is in the correct place, the other is in the wrong place
- 3694 — Two digits are right; one is in the correct place, the other is in the wrong place
- 4721 — Two digits are right; one is in the correct place, the other is in the wrong place
- 1237 — Three digits are right, but all are in the wrong place
We’ll use these clues to narrow down the possibilities.
Common Pitfalls That Lead People Astray
One of the biggest mistakes people make with puzzles like this is assuming too much too quickly. Just because a number shows up a lot doesn’t mean it’s automatically part of the code. You have to look at how each number behaves across different clues. Don’t just count appearances—pay attention to the positions and how the clues interact with each other.
Video : 4 digit number Lock Riddle Can You Crack The Code❓
Breaking Down the Clues
Let’s start with clue 5, because it’s the most powerful.
1237 — Three digits are correct, but all are in the wrong place.
That tells us that out of 1, 2, 3, 7 — three are in the code, just not where they appear in this guess. So we immediately know the code has three of these four numbers. That’s a big hint.
Now compare this with clue 1: 8951 — Two digits are right but in the wrong place. Let’s assume 1 is one of the correct digits. That would align with clue 5.
Clue 2: 2169 — Two digits are right; one is in the correct place, one is not. We already suspect 1 and 9 could be possibilities. 1 appears in position 3 here. If 9 is the second right digit, and it’s in the correct position (4th), we might be onto something.
Clue 3: 3694 — Two digits are right; one is in the correct spot. If 3 and 9 are the right digits here, and 3 is in the correct place (first), it fits with clue 2.
Clue 4: 4721 — Two digits are correct; one in the right spot, one not. If 7 is one of them (appears in clue 5 too), and 1 as well, then maybe 7 is correct in the second position.
Let’s try using what we know:
- From clue 5, likely digits: 1, 3, 7 (three are right).
- From clue 2 and 3, likely digits: 3 and 9.
- From clue 1, 1 and 9 may be correct but in the wrong positions.
Let’s try building a combination using these digits: 3, 7, 1, 9
We’ll test 3 – 7 – 1 – 9
Testing Our Code Guess: 3 – 7 – 1 – 9
Clue 5: 1237 — 1, 2, 3, 7
If our code is 3 7 1 9, then 1, 3, and 7 are in the code, but none are in the same position as in clue 5. ✅ Makes sense.
Clue 3: 3694 — 3, 6, 9, 4
3 and 9 are in our guess. 3 is in the first position in both, so one is in the correct position, one is not. ✅ That works.
Clue 2: 2169 — 2, 1, 6, 9
1 is in position 2 here, but in our guess it’s in position 3. 9 is in the correct position (4). One digit right place (9), one wrong (1). ✅ That fits too.
Clue 1: 8951 — 8, 9, 5, 1
We have 9 and 1 again—both are part of our code and are in wrong positions here. ✅ Good.
Clue 4: 4721 — 4, 7, 2, 1
7 and 1 are in our code, and only one is in the right place. 7 is in position 2 in our guess and here. 1 is in position 4 in the clue, 3 in our code. So only one matches—makes sense. ✅
Everything aligns. Each clue checks out with our code guess.
Video : Can you solve the locker riddle?
Final Answer: 3 – 7 – 1 – 9
If you worked through the logic and landed on the same code—well done! You didn’t just guess; you reasoned your way to the solution, which is exactly what makes puzzles like this so satisfying.
So, Did You Solve It Too?
Let us know in the comments—was this one easy for you, or did it take some trial and error? Share your time, your method, or just celebrate the win!
Want more challenges like this? Keep coming back—we’re dropping more tricky brain teasers, logic puzzles, and fun challenges every week to keep your mind sharp.
And remember: it’s not about how fast you solve it—it’s about how you think your way through it.
