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82815
Upper and Lower Bounds
Description
GCSE Maths (Year 8 Number 2) Quiz on Upper and Lower Bounds, created by Ellen Billingham on 11/05/2013.
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maths
year 8 number 2
maths
year 8 number 2
gcse
Quiz by
Ellen Billingham
, updated more than 1 year ago
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Created by
Ellen Billingham
over 10 years ago
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Resource summary
Question 1
Question
What is the lower bound of 32 if it has been rounded to the nearest unit?
Answer
31
31.5
Question 2
Question
What is the upper bound of 32 if it has been rounded to the nearest unit?
Answer
32.49
32.5
Question 3
Question
What are the bounds of 200 if it has been rounded to the nearest 10?
Answer
LB = 195 UB = 204
LB = 195 UB = 205
Question 4
Question
What are the bounds for 20 to 1 s.f?
Answer
LB = 15 UB = 25
LB = 19.5 UB = 20.5
Question 5
Question
What are the bounds of 20 to 2 s.f?
Answer
LB = 15 UB = 25
LB = 19.5 UB = 20.5
Question 6
Question
A rectangle has sides given as 6cm by 15cm, to the nearest cm. Calculate the limits of accuracy of the perimeter and area of the rectangle.
Answer
Perimeter - Min = 40 and Max = 44 Area - Min = 79.75 and Max = 100.75
40 ≤ Perimeter
Question 7
Question
a = 7.2 to 1 d.p b = 4.5 to 1 d.p What are the largest and smallest possible values for a/b?
Answer
LB = 1.57 UB = 1.63
LB = 1.59 UB = 1.61
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