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WAEC Further Mathematics 2025 Question 11

Question 11

Sequences and Series

Given that 11, p, q, r, s, t, 29 are consecutive terms of a linear sequence (A.P), find the value of (p + q + r + s + t)

  1. A.180
  2. B.140
  3. C.120
  4. D.100
Show the answer and explanation

Answer: D (100)

Explanation

29 is the 7th term: 11 + 6d = 29, so d = 3. The terms are 14, 17, 20, 23, 26, which add up to 100.