Find the expression from a series of guesses and clues.

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This is Equatero level 1. You can also try:
Level 2 Level 3 Level 4 Level 5


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Featured Activity

Connect 4 Factors

Connect 4 Factors

A mathematical version of the popular Connect 4 game based on getting four numbers with a common factor in a line. Fun for one, two or a whole class of pupils.


"Numeracy is a proficiency which is developed mainly in Mathematics but also in other subjects. It is more than an ability to do basic arithmetic. It involves developing confidence and competence with numbers and measures. It requires understanding of the number system, a repertoire of mathematical techniques, and an inclination and ability to solve quantitative or spatial problems in a range of contexts. Numeracy also demands understanding of the ways in which data are gathered by counting and measuring, and presented in graphs, diagrams, charts and tables."

Secondary National Strategy, Mathematics at key stage 3

Go Maths

Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths main page links to more activities designed for students in upper Secondary/High school.


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Saturday, January 8, 2022

"It is not sufficient just to find an expression that’s true but to find the exact expression that I was thinking of. For example 6-1=5 while true would not be correct if I am thinking of 6=1+5."

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Description of Levels



Level 1 - Calculations containing 5 numbers and symbols

Examples: 1+2=3 or 6=8−2

Level 2 - Calculations containing 6 numbers and symbols

Examples: 3×4=12 or 5=14-9

Level 3 - Calculations containing 7 numbers and symbols

Examples: 2×2×2=8 or 5−3=2÷1

Level 4 - Calculations containing 8 numbers and symbols

Examples: 9×6=58−4 or 4+5+9=18

Level 5 - Calculations containing 9 numbers and symbols

Examples: 9^2=24+57 or √16=67−63

Vocabero - A similar game requiring you to guess a mathematical word.

Mathstermind - The Transum version of that old game requiring you to guess a number.

More Puzzles - all with a mathematical theme.

This latest version of Equatero insists that each guess is a valid equation. For a limited time the previous version is still available.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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Currently the greatest number of points earned in the last month for this level (Level 1) has been achieved by 26reverio Shania with 121 points on Wednesday, January 12, 2022. Can you beat that? If you can make sure you claim a trophy because that is how good scores are officially recognised.

26reverio Shania

121 points


Suppose I am thinking of the calculation 1+2=3

You have to try and gress what my calculation is.

For your first guess you may type in 4-1=3

When you have finished typing the tiles will change colour. The colours are the clues:


Now have another guess at my calculation. Use the clues that you have been given.

Each of your guesses (for Levels 1 to 4) should be a correct mathematical equation (two equivalent expressions with an equals sign between them).

You will earn points for guessing my calculation correctly. When you have earned enough points you can claim a trophy.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

Log in Sign up