Here’s a fun brain teaser that’s been stumping thousands online: Can you choose any 3 watermelons from the group below so that their sum equals 30?
It looks simple enough. The watermelons are labeled:
1, 3, 5, 7, 9, 11, 13, 15
Your task is to pick three of them to equal 30.
At first glance, it seems like a quick mental math challenge. But as many find out, it’s not as straightforward as it looks.
Why This Puzzle Is So Confusing
All the numbers you’re given are odd. And there’s one thing we know for sure in basic math:
Adding three odd numbers together always gives an odd result.
But 30 is an even number.
That means no matter which combination of odd numbers you choose, you’ll never get 30. And that’s exactly what makes this riddle clever.
The puzzle tricks you into thinking it’s a math problem, when it’s really a test of observation and creative thinking.
Common Mistakes Most People Make
One of the most common errors is assuming you’re supposed to only use the numbers as they are, without questioning how they’re presented.
Another trap is repeatedly trying combinations like 9 + 11 + 9, or 13 + 15 + 1, hoping to land on 30—but they never work.
And then there are those who think it’s a trick question and say, “It’s impossible.”
But it’s not.
Video : Can You Select 3 Watermelon to get a Sum of 30 Answer
Let’s Solve It Together Step by Step
You’re told to pick three watermelons. Each one is numbered: 1, 3, 5, 7, 9, 11, 13, 15.
Try pairing numbers quickly:
- 1 + 3 + 5 = 9
- 5 + 9 + 11 = 25
- 9 + 11 + 13 = 33
- 3 + 13 + 15 = 31
No matter what combo you try, the sum is never exactly 30. So either the puzzle is flawed… or there’s a hidden trick.
Let’s zoom in on the watermelon labeled 9.
What if you turned it upside down?
That 9 would now become a 6.
This little visual twist is the key to unlocking the answer.
The Correct Answer Is: 13 + 11 + 6 = 30
Here’s how it works:
- Pick watermelon 13
- Pick watermelon 11
- Pick the one labeled 9, but read it as 6 (flipped upside down)
Now add:
13 + 11 = 24
24 + 6 = 30
There it is. Problem solved.
Why This Puzzle Is Brilliant
What makes this riddle so fun is that it pushes your brain to look beyond logic and into visual creativity. It teaches you that sometimes we don’t need more math skills—we just need a fresh perspective.
It also reminds us not to take things at face value. The puzzle isn’t lying, but it’s testing how closely you’re willing to pay attention to the small details.
How to Use This Puzzle With Friends
Now that you know the secret, try showing it to your friends or coworkers. Don’t give them any hints—just ask if they can find three watermelons that add up to 30.
Watch how long it takes before someone flips the 9 to a 6.
Video : Guess the Fruit in 3 Seconds
It’s a great way to challenge people’s creativity and spark conversation. Plus, it’s perfect for classrooms, social media, or team-building activities.
Conclusion: The Answer Was Always There—You Just Had to Look Differently
Riddles like this are great reminders that not every problem is what it first appears to be. The watermelon puzzle isn’t just about addition—it’s about paying attention, questioning what you see, and staying curious.
So next time you face a “simple” challenge that seems impossible, take a step back. Flip your thinking. The answer might just be hiding in plain sight.
Now it’s your turn—did you figure it out before the reveal? Share this with a friend and see if they can beat your time.
