Croeso / Welcome

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A warm Welsh welcome to all of you.

My name is Paul Godding, thank you for visiting and our compendium of daily number puzzles.

How many Challenges are here?

At, there are five challenges posted each day, seven days a week; all designed for our many followers from nearly 170 countries & territories throughout the world. That’s nearly 2,000 during the year!

Our Aim?

Simply to help improve basic knowledge and confidence of arithmetic in a fun way. Start your daily numerical adventure by trying to solve today’s five number puzzles.

How to use our Website

As well as our latest challenges, you can access the remainder of our number puzzles by clicking and keep scrolling down the page.

Alternatively, to retrieve and attempt any particular day’s challenges from the past 12 months, just type in the address bar:

  • for DAY 1, through to …
  • for DAY 365.

The Challenges

We have a vast collection of nearly 2,000 number puzzles on this website, the majority of which are our very own creations.

They have been placed into seven categories:

The Main Challenge – involving different types of number puzzle gathered from all parts of the globe and will vary in content and difficulty from one day to the next.

The 7puzzle Challenge – linked to our signature puzzle board game, this is generally the easiest of the five daily number puzzles. Great for younger or less-confident students and will also improve their knowledge of mathematical terminology.

The Roll3Dice Challenge (DAYS 1 to 10) – puzzlers will be given seven groups of three numbers which replicate the rolling of three dice. The numbers in six of these groups can be manipulated to arrive at the target number, but your task is to find the impossible group of three numbers!

The Lagrange Challenge (DAYS 11 to 250) – named after the French-Italian mathematician who proved that every positive whole number can be made from adding together up to four square numbers. A medium-difficulty challenge where puzzlers must arrive at that particular day’s target number using his theorem.

The Factors Challenge (DAYS 251 to 365) – again related to that particular day’s number, puzzlers have to find which of the numbers listed, if any, are factors of the number in question (it will divide exactly into it). Good practice for ‘bus-stop’ division, and great to test some of the mathematical tricks available to find whether our number is a multiple of 2, 3, 4, 5 . . . and so on.

The Mathematically Possible Challenge – based on our best-selling arithmetic board game and designed to encourage creative number work. Challenges are also at the medium level of difficulty, but may require perseverance to find the possible answers!

The Target Challenge – hardest of the challenges, puzzlers must insert the given numbers into the correct gaps to arrive at the day’s target number. Can sometimes be tricky but will satisfy greatly when solved. A knowledge of BIDMAS, indices and estimation is desirable, but it will also help to think logically.


We always encourage our number puzzles to be utilised for both fun and educational purposes in schools, home or work, but no part of this website may be republished or transmitted without prior permission and accreditation.

Puzzles & answers: Copyright © Paul Godding.

What other information is at the Website?

As well as our ever-expanding website of arithmetical challenges, this is also the place to learn about our successful venture into online maths tuition, as well as our own original designs of board games, card games and puzzles.

We also love football, so click on this UFWC link for some fascinating historical information.

Spread the message

We’d really appreciate it if you could inform family, friends, students and colleagues about our fabulous daily number puzzles at

Please tell them there is no fee or registration required to access our challenges and, more importantly, answers are provided!

You can get in touch by sending tweets to @7puzzle and e-mails to

We hope you enjoy your visit.

Paul Godding


Director, the 7puzzle company