If You Solve This Math Problem on the First Try, You Might Be a Genius
This equation may seem simple at first, but it’s way harder than it looks.
Calling all number nerds: Put away your calculators! We have a problem that is sure to put your mathematical minds to the test. Do you think you have what it takes?
First, here is the equation: 9 – 3 ÷ 1/3 + 1 = ?
That’s it! Before you start, though, we should leave you with a brief warning. This equation may seem simple at first, but it’s way harder than it looks. In fact, only about 60 percent of the engineers got the correct answer on the first try, according to a Japanese study.
If your first instinct was to solve the problem from left to right, your guess is probably 3. But don’t forget to use the PEMDAS rule—“Please Excuse My Dear Aunt Sally,” or “Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction”—which gives the order in which to calculate each set of numbers.
The fraction adds another hurdle to this problem, too. Suddenly, what was once a simple equation now looks like a numerical nightmare.
Need a hint? TipHero suggests dividing 3 ÷ 1/3 first. Remember that dividing fractions actually requires you to multiply, so you should get 9 as the answer. Adding that to the rest of the equation, you’re left with 9 – 9 + 1.
Now, the PEMDAS rules call for you to solve all addition and subtraction problems in the order they appear. So instead of adding first, you will solve the equation from left to right.
If your final answer is 1, congrats! You are correct. But for those who are still stumped, you’re not alone. You can watch this entire video to see how they calculated the solution.
Whether or not you solved the equation on the first try, there is certainly more where that came from. Test your knowledge with this elementary school math test–study up with these tips for bettering your mental math!