Strategy lessons
Practice this topic
The bank includes 81 questions on number sense: 25 easy, 40 medium, 16 hard.
Why this question type matters on the HSAT
The HSAT Math section has 30 questions in 30 minutes — about a minute each. There is no calculator, so mental-math fluency matters as much as conceptual knowledge.
Number sense questions cover fractions, decimals, percents, factors, and order. Memorize the multiplication table cleanly through 12×12; that single thing saves time on every test.
Other topics
Topics are aligned to 8th-grade Common Core standards. The actual CPS HSAT covers slightly more than these buckets but the core mix is the same.