ICTM 2021 Algebra 2 Part 1: #5, #7, & #14
Similar to the 2021 Algebra 1 and Geometry contests, the difficulty of the ICTM 2021 Algebra 2 contest is around an intermediate level. Some usual topics include absolute value, matrices, inequalities, and systems of equations. But some interesting concepts tackled are remainders and base change. Question 12 although not covered in this video isn't especially hard, but an interesting addition.
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Question 5: 0:31
Question 7: 1:21
Question 14: 4:47