Sam saves £6 in week 1. Each week after that he saves £2.50 more than in the week before. How much has he saved altogether after 5 weeks?
Answer and explanation
Correct answer: A. £55.00
- Step 1: Weekly savings: £6, £8.50, £11, £13.50, £16. Step 2. Add: 6 + 8.5 + 11 + 13.5 + 16 = 55. Answer: £55.00. Why not the others: £16.00: This is the amount saved in week 5 only. £39.00: This is the total after only four weeks. £73.50: This is the total after six weeks.
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