Can You Solve This Math Riddle Without Pen and Paper? A Fun Brain Challenge

At first glance, this equation looks incredibly easy:

90 − 10 ÷ 2 + 8 = ?

But don’t rush to answer!

This little brain teaser is designed to test whether you remember the order of operations. Many people make the mistake of simply calculating the numbers from left to right.

So, what answer did you get?

Take a Moment Before Checking

Look carefully at the equation:

90 − 10 ÷ 2 + 8

Would you subtract first?

Would you divide first?

Or do you think the answer is something completely different?

Try solving it in your head before reading further.

The Trick Is the Order of Operations

The important rule here is that division is performed before addition and subtraction.

So we start with:

10 ÷ 2 = 5

The equation now becomes:

90 − 5 + 8

Next, addition and subtraction are handled from left to right:

90 − 5 = 85

Then:

85 + 8 = 93

✅ The Correct Answer Is 93

So:

90 − 10 ÷ 2 + 8 = 93

The most common incorrect answer comes from calculating strictly from left to right:

90 − 10 = 80
80 ÷ 2 = 40
40 + 8 = 48

But that ignores the standard order of operations. (Home – Futurem)

Why This Puzzle Is So Tricky

The numbers are simple, which makes it tempting to answer immediately.

That’s exactly what makes the puzzle fun. Your brain sees 90, 10, 2, and 8 and wants to process them quickly. But the division symbol changes the order in which the calculation should be performed.

It’s a great little challenge to share with family and friends.