1. A phone is reduced by 30% to a price of £120. Calculate the original cost of the system.
2. What is of £240?
3. Write 48 as a product of its prime factors in index form.
4. Factorise x² -2x-35.
5. Write 210,000,000 in standard form.
6. Solve: 2x + 7 ≤ -1.
7. Use prime factors to find the lowest common multiple of 270 and 84.
8. List the first 5 terms of the sequence 8n + 2.
9. Find the total perimeter of the sector shown, correct to one decimal place.
6cm
124°
10. Calculate (4.85x1025)+(1.7×10¹9), giving your answer in standard form correct to two
significant figures.