Sets Quiz
4 questions · easy to harder · Foundations · score and step-by-step answers
How it works
- 4 questions, about 8 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 0 questions have choices. For the others you type the answer: a number like 4, −2, 7/2 or 3.5, or for example x = 4, x = 2 or x = −3, (3, 5), 2x + 1. Use ^ for powers (x^2) and sqrt for √. Any form with the same value counts (7/2 = 3.5).
- One question at a time: Back, Next, Mark for review and the question list at the bottom. No calculator: work it out on paper.
- At the end: your percent and grade, every question right or wrong, why a wrong choice is wrong, and its step-by-step solution. Then practise the lesson with new questions.
Your answers and results are kept in this browser only, so you can close the page and come back.
1 Question 1
Ξ = {1, 2, ..., 12}, A = {3, 6, 9, 12}, B = {2, 4, 6, 8, 10, 12}, find n(A ∩ B)Type the answer.
2 Question 2
Ξ = {1, 2, ..., 12}, A = {1, 2, 3, 4, 6, 12}, B = {4, 8, 12}, find n(A ∪ B)Type the answer.
3 Question 3
Ξ = {1, 2, ..., 15}, A = {3, 6, 9, 12, 15}, B = {5, 10, 15}, find n(A ∪ B)Type the answer.
4 Question 4
Ξ = {1, 2, ..., 20}, A = {1, 4, 9, 16}, B = {2, 4, 8, 16}, find n(A′ ∩ B)Type the answer.