Bounds in calculations 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
A rectangle is 8 cm by 5 cm, both to the nearest cm. Find the upper bound of its area.- A) 46.75 cm²
- B) 40.5 cm²
- C) 467.5 cm²
- D) 4.675 cm²
2 Question 2
A rectangle is 12 cm by 7 cm, both to the nearest cm. Find the lower bound of its perimeter.Type the answer.
3 Question 3
X = 7 and y = 4, both to the nearest whole number. Find the upper bound of x + yType the answer.
4 Question 4
A runner runs 100 m to the nearest m in 12 s to the nearest s. Find the lower bound of the speed.Type the answer.
5 Question 5
A car travels 150 km to the nearest km in 3 h to the nearest h. Find the lower bound of its speed.- A) 4.27 km/h
- B) 42.7 km/h
- C) 427 km/h
- D) 59.8 km/h
6 Question 6
A rectangle is 4.2 m by 2.5 m, both to 1 decimal place. Find the upper bound of its area.Type the answer.
7 Question 7
X = 36 and y = 8, both to the nearest whole number. Find the upper bound of x ÷ y- A) 0.487
- B) 48.7
- C) 4.29
- D) 4.87
8 Question 8
A cyclist travels 60 km to the nearest 10 km in 2.5 h to the nearest 0.1 h. Find the lower bound of the speed.Type the answer.
9 Question 9
X = 15.2 and y = 9.7, both to 1 decimal place. Find the upper bound of x − y- A) −5.6
- B) 5.6
- C) 5.5
- D) 56
10 Question 10
A swimmer swims 50 m to the nearest m in 32 s to the nearest s. Find the upper bound of the speed.Type the answer.