Welcome to the Mathematics OER Smart Library! Our library offers a diverse range of materials—including videos, infographics, games, presentations, animations, and more—covering topics such as algebra, calculus, geometry, statistics, and probability. These resources are available in seven languages: English, Estonian, German, Portuguese, Romanian, Catalan, and Spanish. Additionally, our library includes materials accessible to visually impaired and color-blind individuals. These resources are designed to support educators, students, and researchers in secondary, vocational, and higher education institutions.

Random OERs:

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OER Preview To the OER

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OER Preview To the OER

Exercitii pentru Lectia 26: Sisteme de Ecuații Liniare – Metoda Gauss 26.5 Metoda Gauss 3×3 (parțial)

EngiMath

OER Preview To the OER

Total number of OERs published so far:

3621

To explore and utilize these materials, navigate through our categorized sections or use the search function to find specific OERs of interest.

Title

20.06 det (kA*lB), step by step (10)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Multiplication of determinants, sum of determinants

Tags

EngiMath, Gate2Math

File
ENG-251-XML-EN.zip

Details

Updated: July 10, 2025 at 10:56 pm



Average rating

Title

20.07 det (kA*lB) (STACK) (2)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Multiplication of determinants, sum of determinants

Tags

EngiMath, Gate2Math

File
ENG-252-XML-EN.zip

Details

Updated: July 10, 2025 at 10:56 pm



Average rating

Title

20.08 det(kA^n) (STACK) (1)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Multiplication of determinants, sum of determinants

Tags

EngiMath, Gate2Math

File
ENG-253-XML-EN.zip

Details

Updated: July 10, 2025 at 10:56 pm



Average rating

Title

20.09 det (A±B)/det (kA±lB) (STACK) (4)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Multiplication of determinants, sum of determinants

Tags

EngiMath, Gate2Math

File
ENG-254-XML-EN.zip

Details

Updated: July 10, 2025 at 10:56 pm



Average rating

Title

20.10 det(A) through B and C (rows/columns) (10)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinants, Determinant, Complementary Minor, Algebraic Complement, Laplace Development

Tags

EngiMath, Gate2Math

File
ENG-255-XML-EN.zip

Details

Updated: July 10, 2025 at 10:56 pm



Average rating

Title

20.11 Substitution Property (10)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinant, Substitution

Tags

EngiMath, Gate2Math

File
ENG-256-XML-EN.zip

Details

Updated: July 10, 2025 at 10:55 pm



Average rating

Title

21.01 Upper/Lower triangle, step by step (10)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinant, Triangular matrix

Tags

EngiMath, Gate2Math

File
ENG-257-XML-EN.zip

Details

Updated: July 11, 2025 at 3:24 pm



Average rating

Title

21.02 Calculate det(A)+/-det(B) (STACK) (2)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinant, Sum, Properties

Tags

EngiMath, Gate2Math

File
ENG-258-XML-EN.zip

Details

Updated: July 11, 2025 at 3:24 pm



Average rating

Title

21.03 Find the value of x (3×3), (STACK) (2)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinant, Properties

Tags

EngiMath, Gate2Math

File
ENG-259-XML-EN.zip

Details

Updated: July 11, 2025 at 3:24 pm



Average rating

Title

21.04 Upper/Lower Triangular 5×5, (STACK) (2)

Authors

EngiMath Project

Educational level

Higher Education

Level

medium

Description

Group of Questions for Moodle on Matrices – Introduction, XML format
– ALL questions have feedback with STEP-by-STEP resolution. Note: It requires a Moodle platform to be inserted into the question bank and, eventually, a specific plugin/software may be necessary for its operation.

Licence

CC-BY

Type

Quiz/Knowledge Control

Category

Linear algebra – Matrix calculus

Keywords

Determinant, Triangular matrix

Tags

EngiMath, Gate2Math

File
ENG-260-XML-EN.zip

Details

Updated: July 11, 2025 at 3:23 pm



Average rating