What’s inside: Misconception coverage summary: Questions 1–3 target sampling and inference errors — trusting friends, the pizza line, or a single team as a sample, reporting the raw sample count or the percent as the population answer instead of scaling, and misreading normal sample-to-sample variation as error or false precision. Question 4 targets comparison traps:…

What’s inside: Misconception coverage summary: Questions 1–3 target scale errors — adding or subtracting the scale number instead of multiplying, converting in the wrong direction (dividing drawing→actual or multiplying actual→drawing), and the big one: scaling area by k instead of k², plus believing area doesn’t scale at all. Questions 4–7 target triangle-condition traps: assuming any…

What’s inside: Misconception coverage summary: Questions 1, 2, and 4 target solving-order errors — adding instead of subtracting the constant, skipping it entirely, dividing only some terms (the x = −1 trap), stopping at 3x = 15, and multiplying instead of dividing. Questions 5–8 target inequality traps: the missed flip when dividing by a negative,…

What’s inside: Misconception coverage summary: Questions 1, 2, and 3 target the combining traps — merging unlike terms (3x + 2 = 5x), swapping which numbers belong to which pile, and the vanishing variable (5x − 2x = 3) — with multiplication-instead-of-addition slips as secondary distractors. Questions 4, 5, 6, and 9 target distribution errors:…