Strategy lessons
Practice this topic
The bank includes 59 questions on data & probability: 17 easy, 26 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.
Data and probability covers mean, median, mode, range, simple probability, and chart reading. Watch for 'with replacement' vs 'without replacement.'
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.