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Details for problem "Magic triangle with sums to be filled in correctly"

Quickname: 1655

Suitable for K-12 grades: Grade 3 Grade 4 Grade 5 Grade 6 Grade 7 Grade 8

Elementary School, Primary School, Junior High School, Middle School, High School.


In a magic triangle, six numbers have to be filled in correctly.


In a magic triangle, six numbers have to be filled in correctly. (Example for this math problem) In a magic triangle, six numbers have to be filled in correctly. (Example for this math problem)


A magic triangle is shown. The triangle consists of six boxes that form the three vertices and the three edges. Across each edge, a number is indicated. Numbers have to be filled in in a way that the sum of the boxes along each edge matches the number indicated.

The numbers are whole numbers and can be selected to be positive, negative or both. The number of decimal places can be chosen.

Some boxes may be already filled with the correct numbers. There are multiple options on which of the boxes are already filled in. As a further aid, a sorted list with the numbers to be filled in can be provided with the problem.

The number of problems can be selected.

Topics: Arithmetic Elementary arithmetic Puzzles Rational Numbers Whole Numbers

Tags: Addition Subtraction

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Customization options for this problem

Possible values
Number of problems
1, 2, 3, 4, 5, 6
Number range
20, 30, 40, 50, 100, 200, 500, 1000, 10000, 100000
Decimal places
0, 1, 2, 3
mixed, positive, negative
Numbers already filled
Yes, No
Numbers to be used given
one, outer ones, inner ones, two in a row, three in a corner, none

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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