At first glance, this The 1% Club puzzle looks almost too easy to cause any trouble.

There are no strange symbols.
No complicated equations.
No hidden shapes or obscure general knowledge.
Just one very obvious-looking sum:
571 + 962 = 840
Clearly, something is wrong.
And the challenge sounds simple enough:
Which two digits do you need to swap to make the maths problem correct?
It feels like the sort of question you should be able to solve almost immediately.
But that confidence can disappear very quickly once you start moving numbers around.
Give yourself 30 seconds before scrolling down to the answer.
Because the biggest trap here is trying to change too much.
Your Eyes Immediately Go To The Answer
The first instinct is often to stare at 840.
After all, 571 plus 962 is nowhere near 840, so surely one of those final three digits must be in the wrong place.
Perhaps the 8 needs to move.
Maybe the 4 belongs somewhere in one of the numbers on the left.
Or perhaps the 0 needs to be swapped with something else entirely.
That approach quickly creates dozens of possibilities.
And suddenly, a puzzle that looked like basic arithmetic starts becoming surprisingly irritating.
But there is one important detail in the wording.
You aren’t being asked to change a number.
You aren’t being asked to move several digits.
You only need to swap two digits.
Everything else must stay exactly where it is.
The 840 May Not Be The Problem At All
This is where the puzzle starts playing with your expectations.
Because once you see an incorrect equation, your brain naturally assumes the result must need fixing.
But what if 840 is already exactly right?
That possibility dramatically changes the challenge.
Now, instead of trying to rebuild the whole equation, you only need to make the two numbers on the left add up to 840.
The first number is:
571
The second is:
962
So the question becomes much more focused.
Can two digits somewhere in those numbers trade places and suddenly produce the correct total?
There are still plenty of combinations.
But one swap changes everything.
Don’t Overlook The Digits Inside 962
Take another look at the second number:
962
What happens if the first and last digits trade places?
That would turn:
962
into:
269
Now put the equation back together.
And suddenly, the answer on the right starts looking very interesting indeed.
If you’ve spotted it, you’ve cracked the puzzle.
If not, this is your final chance before the solution.
The Answer: Swap The 9 And The 2
The two digits you need to swap are:
9 and 2
They are both inside 962.
Swap their positions and:
962 becomes 269
The equation now reads:
571 + 269 = 840
And that is completely correct.
You can check it quickly:
571 + 200 = 771
771 + 60 = 831
831 + 9 = 840
So the corrected equation is:
571 + 269 = 840
The clever part is that nothing on the right-hand side needed changing at all.
The 840 was correct from the beginning.
The entire puzzle was solved simply by swapping the 9 and the 2 in the middle number.
It is exactly the kind of The 1% Club challenge that looks almost laughably straightforward once someone shows you the answer — but becomes much harder when you’re staring at the screen with the clock running.