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Justin Roughley
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Equatum Puzzles Paperback – October 22, 2020

by Justin Roughley (Author)
5.0 5.0 out of 5 stars 13 ratings
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Looking for a new puzzling challenge?
Equatum Puzzles is the first ever book of a new type of puzzle.

’An ingenious mix of logic and arithmetic’ – Alex Bellos

At first glance, these puzzles look like a crossword. Instead they are filled with numbers and operators: + – x ÷ =. Each puzzle’s solution is a grid of intersecting equations. To solve them you'll need an unusual blend of logic, arithmetic and ingenuity!
The book includes:
• A full introduction to Equatum and equations
• 100 hand selected puzzles
• Puzzles ranked from Beginner to Diabolical.
• One puzzle per page to give space for your workings.
• All solutions included.
Find out more at: www.equatum.com
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  1. Print length
    144 pages
  2. Language
    English
  3. Publication date
    October 22, 2020
  4. Dimensions
    6 x 0.33 x 9 inches
  5. ISBN-13
    979-8621937300
  6. See all details
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Product details

  • ASIN ‏ : ‎ B08LN979M2
  • Publisher ‏ : ‎ Independently published (October 22, 2020)
  • Language ‏ : ‎ English
  • Paperback ‏ : ‎ 144 pages
  • ISBN-13 ‏ : ‎ 979-8621937300
  • Item Weight ‏ : ‎ 8.8 ounces
  • Dimensions ‏ : ‎ 6 x 0.33 x 9 inches
  • Customer Reviews:
    5.0 5.0 out of 5 stars 13 ratings

About the author

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Justin Roughley

Justin Roughley

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Justin fell in love with maths when he was 10 through thinking about Pascal’s Triangle and the Fibonacci series. He loves problem solving of many kinds including logical and mathematical puzzles. He has spent his life exploring maths, software, databases, the Dharma, embodiment, wildness, vegetable-growing and puzzles. One of his favourite things is to sit in a café with puzzles and a cortado!

Customer reviews

5 out of 5 stars
13 global ratings

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Top reviews from the United States

  • ROCKMAN
    5.0 out of 5 stars Brilliantly created puzzles
    Reviewed in the United States on February 28, 2021
    Verified Purchase
    These puzzles use basic arithmetic and are challenging at the same time.
    The author has done a brilliant job creating these.
    Helpful
     Report
  • Ian L
    5.0 out of 5 stars Simple, unique idea... yet entertaining at the same time.
    Reviewed in the United States on November 2, 2020
    Verified Purchase
    Simple, unique idea... yet entertaining at the same time.
    Sure to keep you busy for hours.
    A must have for puzzle book fans 👍🏻
    Helpful
     Report

Top reviews from other countries

  • Amazon Customer
    5.0 out of 5 stars Brilliantly simple and endlessly varied logic puzzles.
    Reviewed in the United Kingdom on November 1, 2020
    Verified Purchase
    Equatum is a type of logic puzzle, similarly to su-doku and kakuro, although it is laid out in the style of a crossword. The "clues" are collections of numbers and mathematical symbols that can be arranged into a correct equation. The arithmetic involved is not at all challenging, at any level, but there are numerous possible orders. There are 7 sections, starting with introductory puzzles, then moving onto easy and through to diabolical. I tried a few introductory puzzles then moved onto the next few levels. Although the idea stays the same, the later levels are a real challenge to the logical skills and may need some clever techniques to solve. There are 100 puzzles and this should be enough entertainment for quite some time.
    Report
  • Josur
    5.0 out of 5 stars A brilliant and unique puzzle book!
    Reviewed in the United Kingdom on October 29, 2020
    Verified Purchase
    Excellent book with challenging puzzles throughout. The author has developed a whole new type of Maths puzzles which can be bite size training for your brain or when tackling one of the harder puzzles can really put the grey matter really through it’s paces.

    It’s refreshing to find a maths puzzle book which you can pick up, is accessible to all levels and challenging at the same time.

    I’d thoroughly recommend this as a gift for yourself and your friends
    Report
  • Andrew Blox
    5.0 out of 5 stars What's not to like about Equatum?
    Reviewed in the United Kingdom on November 11, 2020
    Verified Purchase
    We all need a little help clearing the brain fog and these wonderful Equatum puzzles are the perfect solution to bring a touch of clarity back into our lives. A masterstoke of puzzle-making genius marries number and function with a crossword framework. Quite simply they are great fun with levels of difficulty to suit your puzzle-solving mood on the day. Perfect for beginners and experts alike. Happy puzzling.
    Report
  • maggie pearson
    5.0 out of 5 stars Brilliant brand new logic puzzles
    Reviewed in the United Kingdom on November 16, 2020
    Verified Purchase
    Brilliant to find these brand-new logic puzzles. All you need before you start are basic arithmetic skills (including BODMAS hint hint!), a good dose of logic, a dash of intuition and a lot of time - these Equatum puzzles are addictive! Good progression of difficulty, through easy to fiendish. The rationale for these puzzles is exceptionally well, and clearly, described, as are the 'instructions'.
    Report
  • KG
    5.0 out of 5 stars For the nerd in your life.
    Reviewed in the United Kingdom on November 4, 2020
    Verified Purchase
    I've known Justin as a valued colleague for a while put I didn't realise he was an evil genius.

    I'm really enjoying these and have found the quirks and my false assumptions amusing. Great christmas tree present - they're on my shopping list.

    Go on, you know you want to.
    Report