The table below shows the number of library books borrowed by three students over 4 weeks. Ahmad: 5, 10, 15, 20 (Weeks 1–4). Siti: 12, 11, 10, 9 (Weeks 1–4). Priya: 1, 2, 4, 8 (Weeks 1–4). Each student continues borrowing according to the same pattern. Who will borrow the most books in Week 5?
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Worked Solution
Step 1: Identify the pattern for each student.
Ahmad: 5, 10, 15, 20 — increases by 5 each week (arithmetic).
Siti: 12, 11, 10, 9 — decreases by 1 each week (arithmetic).
Priya: 1, 2, 4, 8 — doubles each week (geometric).
Step 2: Find each student's Week 5 value.
Ahmad: 20 + 5 = 25 books.
Siti: 9 - 1 = 8 books.
Priya: 8 x 2 = 16 books.
Step 3: Compare. 25 > 16 > 8.
Answer: Ahmad will borrow the most books in Week 5 (25 books).
Correct answer: Ahmad
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