# Can You Guess the Secret Word in This Brain Teaser?

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On his YouTube channel Mind Your Decisions, Presh Talwalkar shares logic puzzles dealing with geometry, statistics, and algebra. The puzzle below from the former Stanford math and economics student features no numbers, but that doesn’t mean it's easy to figure out.

To solve the brain teaser, you need to guess the secret word based on a few clues. Here’s the set-up: A teacher is leading a class and Albert, Bernard, and Cheryl are his students. He writes the words "cat," "dog," "has," "max," "dim," and "tag" on the board. He distributes one sheet of paper to each of his three students, with each piece containing a different letter from one of the words. He then tells them that together their letters spell one of the words on the board. The students only know their letter, they don’t know anyone else's.

The teacher asks Albert if he knows the secret word. Albert says yes, he does know it. Next, the teacher asks Bernard. After some hesitation, he replies that yes, he knows the secret word as well. Finally, the teacher asks Cheryl if she knows what the word is. She thinks for a moment and says that yes she does. Albert, Bernard, and Cheryl have successfully guessed the secret word. Do you know what it is based on their answers?

Figuring out the word without knowing any of its letters may seem difficult, but it’s not impossible. If you don’t know where to start, think about Albert’s answer and use the process of elimination to rule out some of the letters and words written on the board. Keep in mind that Bernard could only come to his conclusion from Albert’s answer, and Cheryl from Bernard’s.

Still lost? If you haven’t gotten to the bottom of it yet, the correct answer is "dog." When Albert answers that he knows what the right word is based on one letter, you can use that information to narrow down his possible letters to one of the six that are never repeated on the board: c, o, h, s, x, and i. And when Bernard says that he knows too, you can deduce that his list of potential letters is limited to t, g, h, or s. That leaves "cat," "dog," and "has" as the three remaining options. Cheryl’s answer confirms that she has the letter d, which means the secret word is "dog."

If you’re looking for a more detailed walkthrough of the puzzle-solving process, check out the video from Presh Talwalkar below.

# Can You Find the Lost Items in This Santa's Workshop Puzzle?

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If the holiday season has you feeling stressed, here's an opportunity to take a break from making travel plans and brainstorming gift lists. This picture puzzle from Attic Self Storage features six hidden items, and it takes most people a few minutes to find them all.

The scene below depicts the chaos of Santa's workshop leading up to Christmas Eve. Hidden among the elves and toys are some lost items: a stocking, a nutcracker, Santa's hat, a mince pie, a Christmas cracker, and a robin. If you aren't sure what you're looking for, a visual key of the items is included at the bottom of the image.

Attic Self Storage

It took Attic Self Storage staff members 3 minutes and 26 seconds on average to solve the brain teaser, so that's the time to beat. After completing the challenge, see if you can spot the sheep hidden among the Santas in this holiday-themed puzzle.

# You Can Gift Your Favorite Nerd a Subscription to Famous Letters From History

Letterjoy

Letter writing may be a lost art at this point, but you can still give someone the gift of getting a great letter in the mail, without ever picking up a pen yourself. Letterjoy, a subscription service for historical letters, sends out a different archival letter each week, giving subscribers the opportunity to dig through their mail and find a work of great writing rather than a pile of junk advertisements.

As part of the service, Letterjoy sends out one authenticated historical letter or telegraph each week, according to monthly themes. The letters are largely drawn from the last 400-plus years of American history, sourced by Letterjoy founder Michael Sitver from historical archives and private collections. Previous monthly themes have included "presidents and the press," "the right to vote," "Civil War spies," and "the birth of aviation." The letters often come from famous figures like Abraham Lincoln, Albert Einstein, Winston Churchill, Clara Barton, and the Wright brothers.

Recipients don't just get a photocopy of an archival letter. Each letter is custom-designed by Letterjoy, either typed up on a Smith-Corona typewriter (for more modern missives) or handwritten by designers and enhanced with software. The goal is to make each letter look and feel as authentic as possible while maintaining readability—since the whole point is to read the letters, not just look at them.

Every letter comes with a context section that explains what the letter is and why it matters, including who the letter-writer and recipient were and the historical events surrounding its writing.

You can buy someone (or yourself) a yearly plan for \$160 (\$13.33 a month), a six-month plan for \$100 (\$16.66 a month), or a three-month plan for \$50 (also \$16.66 a month). Discounts are available for educators who want to use the letters in their classrooms.

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