Here’s a tricky challenge: Remove exactly one letter from the word “SIX” and make the remaining letters represent NINE (9). You cannot add anything, rearrange the letters, or change the word. Removing X leaves “SI,” while removing I leaves “SX.” Neither seems to work, so what’s the secret? The trick is to stop thinking about English spelling and look at the letters differently!

The answer lies in the Roman numeral system, where letters represent numerical values. The Romans used seven main symbols: I (1), V (5), X (10), L (50), C (100), D (500), and M (1,000). These symbols can be combined through addition or subtraction, depending on their positions. For example, VI means 6, while IV means 4.

Now look at the word SIX again. Remove only the first letter, S, and you’re left with IX. In Roman numerals, X represents 10 and I represents 1. When I appears before X, its value is subtracted from 10. That gives us IX = 10 − 1 = 9. No extra letters, no rearranging, and no complicated calculations are needed!

THE ANSWER IS S! 🎯 Sometimes the hardest part of a brain teaser isn’t the calculation but recognizing that you need a different way of looking at the problem. Did you spot the Roman numeral trick immediately, or did you try removing the other letters first? How many seconds did it take you? Share your answer in the comments! 🏆