Higher January 2020 Paper 2R Q1
1
(a) Write \(\;5^{17} \times 5^2\;\) as a single power of 5 (1)
(b) Write 800 as a product of its prime factors.
Show your working clearly. (2)
Show your working clearly. (2)
| Scheme | Marks |
|---|---|
| \(5^{19}\) | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| M1 | |
| Working required Answer: 2 × 2 × 2 × 2 × 2 × 5 × 5 | A1 |
| (2) | |
| (3 marks) |
Notes
M1: A factor tree / division ladder of 3 or more factors (≠ 1), multiplying to 800, which must include 2 and 5. Condone 1 error when product ≠ 800
A1: dep on M1 oe eg \(2^5 \times 5^2\)