4MA0 Foundation June 2015 Paper 2 Q10
10
(a) Write down the square root of 100 (1)
Kwo writes down one square number and one cube number.
When she adds the two numbers together, she gets a total that is more than 80 but less than 100
(b) What square number and what cube number could Kwo have written down? (3)
| Scheme | Marks |
|---|---|
| 10 | B1 |
| (1) |
Notes
B1: Accept \(-10\) or \(\pm 10\)
| Scheme | Marks |
|---|---|
| 1, 4, 9, 16... | M1 |
| 1, 8, 27... | M1 |
| 25 and 64 or 64 and 27 or 81 and 1 or 81 and 8 | A1 |
| (3) | |
| Total 4 marks |
Notes
M1: or any square number identified
M1: or any cube number identified
A1: allow \(5^2, 4^3\) or \(8^2, 3^3\) or \(9^2, 1^{(3)}\) or \(9^2, 2^3\) but not 5,4 etc