Samples and predictions Quiz
10 questions · easy to harder · Foundations · score and step-by-step answers
How it works
- 10 questions, about 20 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 4 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
12 of 40 students walk to school. About how many of 600 walk?Type the answer.
2 Question 2
9 of 30 people like jazz. About how many of 900 like jazz?Type the answer.
3 Question 3
Is it a good sample: to find the favorite sport at a school, ask 20 players on the soccer team- A) Yes
- B) No
4 Question 4
Is it a good sample: to find how much people read, ask 30 people in the library- A) Yes
- B) No
5 Question 5
18 of 45 voters like the plan. About how many of 2,000 like the plan?Type the answer.
6 Question 6
14 of 35 students play an instrument. About how many of 700 play an instrument?Type the answer.
7 Question 7
Is it a good sample: to find the favorite fruit at a school, ask 30 students picked from a hat- A) Yes
- B) No
8 Question 8
24 of 64 fans buy a shirt. About how many of 4,000 buy a shirt?Type the answer.
9 Question 9
27 of 75 runners finish in under an hour. About how many of 1,500 finish in under an hour?Type the answer.
10 Question 10
Is it a good sample: to find how much time teens spend online, ask 40 members of the computer club- A) Yes
- B) No