Find the Upper and Lower Bound of Data

What is the upper bound and lower bound of 390 grams, measured to the nearest 10 grams?

• 385 and 395

• 390.5 and 389.5

• 400 and 380

• 395 and 385

Work out the upper bound and lower bound for 32 cm, measured to the nearest cm

• 32.5 and 31.5

• 31.5 and 32.5

• 35 and 30

• 33 and 31

a = 60 rounded to the nearest 10b = 5.7 rounded to one decimal place.What are the lower and upper bounds of a/b

• 10.55 and 10.45

• 11.5 and 9.57

• 10.35 and 10.71

• 10.77 and 9.91

The distance travelled by an object is 18 metres in a time of 1.8 seconds. Both measurements have been given correct to 2 significant figures. Calculate the minimum and maximum possible speed of the object in m/s.

• 9.75 and 10.35

• 9.5 and 10.5

• 9.46 and 10.57

• 10 and 9

A sheet of paper is 0.08mm thick correct to 2 decimal places. Calculate the difference between the least and greatest possible heights if 2000 pieces of paper are stacked on top of each other

• 200

• 20

• 2000

• 160

The weight, w grams, of the bag of sweets is 250 g correct to the nearest 10 g. Find the lower bound and the upper bound of w

• 245 and 255

• 249.5 and 250.5

• 247.5 and 252.5

• 240 and 260

To the nearest thousand, 90 000 cars drive through the road toll in one week.Write down the lower bound for this number of cars.

• 85000

• 89950

• 89500

• 89999.5

The number 10 has been rounded to the nearest whole number. Find its lower and upper bounds

• 9 ≤ 10 < 10

• 9.5  ≤ 10  < 10.5

• 9 ≤ 10 < 11

The number 1000 has been rounded to the nearest 100. Find its lower and upper bounds

• 950  ≤ 1000  < 1050

• 950 ≤ 1000 < 1050.1

• 950 ≤ 1000 < 1051

The number 51.2 has been rounded to the nearest 1 decimal place. Find its lower and upper bound

• 51.1 ≤ 51.2 < 51.2

• 51.15  ≤ 51.2  < 51.25

• 51 ≤ 51 < 51