1. 1
   The value 47.6284 is to be rounded to different degrees of accuracy.

   (a)

   Round 47.6284 to 2 decimal places.

   [1 mark]

   • A47.62
   • B47.63
   • C47.6
   • D47.628

   (b)

   Round 47.6284 to 3 significant figures.

   [1 mark]

   • A47.6
   • B47.63
   • C48.0
   • D47

   (c)

   Round 47.6284 to 1 significant figure.

   [1 mark]

   • A40
   • B47
   • C50
   • D48

   Total for question 1: 3 marks

2. 2
   Estimate the value of $\frac{58.7 \times 3.92}{0.198}$ by rounding each number to 1 significant figure.

   (a)

   Round each number in the expression $\frac{58.7 \times 3.92}{0.198}$ to 1 significant figure.

   [2 marks]

   (b)

   Use your rounded values from part (a) to estimate the value of the expression.

   [2 marks]

   Total for question 2: 4 marks

3. 3
   A length is measured as 8.4 cm, correct to 1 decimal place. A mass is measured as 250 g, correct to the nearest 10 g.

   (a)

   Find the upper and lower bounds of the length, which is measured as 8.4 cm correct to 1 decimal place.

   [3 marks]

   (b)

   Find the upper and lower bounds of the mass, which is measured as 250 g correct to the nearest 10 g.

   [3 marks]

   Total for question 3: 6 marks

4. 4
   A rectangular field has a length of 120 m and a width of 75 m, both measured correct to the nearest metre. A runner covers a distance of 400 m, correct to the nearest metre, in a time of 52 seconds, correct to the nearest second.

   (a)

   Find the upper bound of the perimeter of the field.

   [4 marks]

   (b)

   Find the lower bound of the area of the field.

   [4 marks]

   (c)

   Find the upper bound of the runner's average speed, giving your answer in m/s correct to 3 significant figures.

   [5 marks]

   Total for question 4: 13 marks

End of questions