Foundation June 2025 Paper 1 Q25
25
(a) Write 520 million in standard form. (1)
(b) Write \(8.79 \times 10^{-5}\) as an ordinary number. (1)
(c) Work out \(\left(5 \times 10^{42}\right) \times \left(7 \times 10^{-180}\right)\)
Give your answer in standard form. (2)
Give your answer in standard form. (2)
| Scheme | Marks |
|---|---|
| \(5.2 \times 10^8\) | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| 0.000 087 9 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| \(35 \times 10^{-138}\) or \(3.5 \times 10 \times 10^{-138}\) or \(3.5 \times 10^n\) where \(n \neq -137\) | M1 |
| Correct answer scores full marks (unless from obvious incorrect working) Answer: \(3.5 \times 10^{-137}\) | A1 |
| (2) | |
| (4 marks) |