7 Challenging Brain Teaser Puzzles for Adults

Tired of board games? Challenge yourself with these mind-boggling brain teaser puzzles instead.

We often recommend media and products we like. If you buy anything through links on our site, we may earn a commission.

When’s the last time you sat down to complete a brain teaser? Probably not since your childhood. Now that you’re older, you might think you can breeze through a brain teaser puzzle.

As much as you might want to think you’ve improved at problem-solving, brain teasers will knock you down a peg.

Here are the best brain teaser puzzles for adults that’ll provide you with hours of challenge and confusion.

1. Hanayama Hourglass

This puzzle consists of four flat, hourglass-shaped pieces of cast metal that come together to form the compact object in the above image. You must attempt to separate each piece from the puzzle, and then put them back together.

Hanayama ranks its puzzles’ difficulty level from one to six, with six as the most difficult. The Hourglass Brain Teaser is ranked six, so don’t expect to spend just a few minutes solving it.

2. Wine Bottle Lock

When you get rewarded for solving a puzzle, you’ll have much more motivation to solve it.

The Bottle Lock Brain Teaser is a perfect example of this—if you manage to solve the puzzle and free the trapped wine bottle, you get to pour yourself a drink. Not only is this a fun puzzle for yourself, but it also makes a great gift or party activity.

3. Sharp Brain Zone Wooden Cube

Who doesn’t love a good game of Tetris? This Wooden Cube Brain Teaser acts like a real-life version of the classic video game.

The puzzle comes with a tiny wooden frame, as well as a ton of puzzle pieces. It’s your job to build a cube inside the frame with all of these Tetris-like pieces.

4. SiamMandalay Powder Keg

The Powder Keg Puzzle from SiamMandalay is the perfect nerdy desk toy to bring with you to work. It may look like some sort of decoration at first glance, but when you pick it up, you’ll realize that the wooden pieces come apart.

Just remember, once you figure out how to take the puzzle apart, it won’t be easy to put back together!

5. Hanayama Quartet

Hanayama brings us yet another perplexing brain teaser, with its frustration-inducing Quartet Puzzle. The puzzle has four linked pieces that you must work to separate.

There are only two ways to solve this puzzle—its difficulty level is ranked level six, so it’s far from easy.

6. Hanayama Nutcase

This tricky brain teaser looks like something you’d find in your toolshed. Unfortunately, it’s not as simple as it seems. Hanayama’s Nutcase Puzzle attaches two screws using two nuts.

You’re tasked with separating the two nuts, and then putting them back together. To make things more challenging, try changing the writing on the nuts from “nut case” to “case nut.”

This brain teaser will surely drive you nuts in the process.

7. Rubik’s Cube

The go-to brain teaser puzzle for decades has always been a Rubik’s Cube. This seemingly simple puzzle challenges you to line up matching colors on each side of the cube.

As you frantically twist the rows of colors, you just might come across one of the billion combinations that lead to a solution. You’ll be able to add speed-solving to your list of unique nerdy hobbies!

Is Your Brain Working Hard Yet?

If you’re feeling rusty, you might want to start with the Rubik’s Cube or Bottle Lock Puzzle Puzzle as a warmup, and then graduate to solving Hanayama’s collection of challenging conundrums. Your brain is bound to get a workout either way.

When you’re ready for a break from brain teasers, you should relax with some LEGO sets that are fun to build!

Similar & Trending

The 6 Best Puzzle Subscription Boxes That Are Fun to Solve

7 Geeky Desk Toys to Personalize Your Office Workstation

10 Unique Nerdy Hobbies That Haven’t Gone Mainstream Yet

11 Impressive Nerdy LEGO Sets for Adults

The 7 Best Jurassic Park Dinosaur Toys

A History of Terrible Toys: The Worst Toys Ever Made