4400 Higher June 2008 Paper 3 Q15
15 Mia’s weight is 57 kg, correct to the nearest kilogram.
(a) Write down
(i) the upper bound of her weight,
(ii) the lower bound of her weight.
(2)Alice’s weight is 62 kg, correct to the nearest kilogram.
(b) Work out the upper bound for the difference between Alice’s weight and Mia’s weight. (2)
| Scheme | Marks |
|---|---|
| (i) Answer: 57.5 | B1 |
| (ii) Answer: 56.5 | B1 |
| (2) |
Notes
B1: for 57.5, \(57.4\dot{9}\), 57.499, 57.4999 etc but NOT for 57.49
B1: for 56.5 Also accept 56.50
| Scheme | Marks |
|---|---|
| 62.5 − “56.5” | M1 |
| 6 | A1 |
| (2) | |
| (4 marks) |
Notes
M1: for 62.5 − “56.5” Accept \(62.4\dot{9}\), 62.499, 62.4999 etc instead of 62.5
A1: for 6, \(5.\dot{9}\), 5.999 etc ft from “56.5”