A collection of practice problems or exercises (book/workbook) used for study or exam preparation.
テストに備えて数学の問題集を毎日一章ずつ解いている。
To prepare for the test, I'm solving one chapter of the math workbook every day.
塾で渡された問題集を週末にまとめて取り組んだ。
I worked through the workbook given at cram school over the weekend.
基礎固めには繰り返し解ける問題集が役に立つ。
Workbooks that you can repeat are useful for building a solid foundation.