Puzzles & Quizzes

# Can You Find Both Correct Answers to This Math Puzzle?

We love puzzles here at Curiosity: even the ones that are too hard for us. Scratch that — especially the too-hard ones. Even without getting the answer for yourself, it's satisfying to find out the one-and-only answer to the "Hardest Logic Puzzle Ever." But this puzzle is a little different: there's only one blank to fill in, but two possible answers that could go there. Can you figure out both of them?

## The Setup

The puzzle consists of a series of numbers, which are all related to each other in a way that starts out clear-cut and swiftly gets murky. At the end, there's a single blank space for the last number in the sequence. Here's how it goes:

1 + 4 = 5

2 + 5 = 12

3 + 6 = 21

8 + 11 = ???

Okay, this looks doable. One plus four is five, so we're assuming that's how the first line works. But then there's the next line. Two plus five doesn't equal 12, but two plus five plus the five from the last line does. Okay. And then 3 plus 6 plus the 12 from the last line equals 21. Finally, eight plus 11 plus 21 equals 40. Voila — there's your answer.

The only problem is, there's another answer to this sequence. Take a minute to try and work it out. We'll give you a hint: for the second answer, the order of the lines doesn't matter, but the order of the numbers in those lines does. When you're ready, watch this video — this puzzler found the other answer more intuitive than 40. Can you work it out before he does?

#### The 1 + 4 = 5 Puzzle

##### "Only 1 In 1000 Can Solve" The Viral 1 + 4 = 5 Puzzle. The Correct Answer Explained
– MindYourDecisions