This link will help you make modular arithmetic calculations.

You should take a look at this short exercise sheet on Semester II algebra material. These are the level of questions that you'll be expected to answer in the end of semester exam.

Lecture 1

Lecture 2

Lecture 3

Lecture 4

Lecture 5

Lecture 6

Lecture 7

Lecture 8

Lecture 9

Lecture 10

Lecture 11

Lecture 12

Lecture 13

Lecture 14 was a tutorial

Lecture 15 was a tutorial

Lecture 16

Lecture 17

Lecture 18

Lecture 19

See here for an explanation of how eigenvalues are used to determine the page rank of a web page in the Google search engine.

Lecture 20

Lecture 21

Lecture 22