At first glance, this problem looks incredibly easy.
In fact, most people are confident they know the answer within seconds.
But that’s exactly why so many get it wrong.
The challenge isn’t difficult math—it’s remembering one simple rule that many of us learned in school and then forgot over the years.
Ready to test yourself?
The Challenge
Without using a calculator, solve this expression:
40 + 40 × 0 + 1 = ?
Choose your answer:
A) 0
B) 41
C) 81
Take a moment before scrolling.
Don’t rush.
What answer did you get?
Why So Many People Get It Wrong
Most
answers come from performing the calculations from left to right.
People often see:
40 + 40 = 80
80 × 0 = 0
0 + 1 = 1
Or they make similar mistakes because they forget the correct order of operations.
The secret isn’t advanced mathematics.
It’s simply following the rules.
The Correct Solution
Let’s solve it step by step.
Step 1: Remember the Order of Operations
In math, multiplication must be completed before addition.
Many students learn this rule through:
PEMDAS
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
Or BODMAS, depending on where they attended school.
Step 2: Complete the Multiplication First
The expression is:
40 + 40 × 0 + 1
First calculate:
40 × 0 = 0
Now the equation becomes:
40 + 0 + 1
Step 3: Complete the Addition
40 + 0 = 40
40 + 1 = 41
Final Answer
B) 41
Why This Puzzle Is So Effective
This puzzle isn’t testing your ability to perform difficult calculations.
It’s testing your attention to detail.
Many people rush through simple problems because they assume they already know the answer.
The brain loves shortcuts.
Sometimes those shortcuts help us.
Sometimes they trick us.
That’s why these puzzles spread so quickly online. The math itself is easy, but the challenge forces people to slow down and think carefully.
One More Quick Test
Now that you’ve solved this one, try another classic:
8 ÷ 2(2 + 2)
What answer do you get?
If you enjoy puzzles like these, you’re giving your brain a surprisingly effective workout. Even simple math riddles help improve focus, logical thinking, and attention to detail.
So be honest…
Did you get 41 on your first try, or did this puzzle fool you?