ECZ 2015 · O-Level Paper 1 — Sequences and Series
The patterns in the diagram were made using floor tiles. Find the number of floor tiles in pattern number 10.
- A. 37
- B. 41
- C. 40
- D. 33
Verified working — step 1
The tile counts form the sequence 1, 5, 9, … with common difference 4. T₁₀ = 1 + (10 − 1) × 4 = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question