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WAEC Mathematics 2024 Question 3

Question 3

Progressions

The first term of an Arithmetic Progression (A.P) is 2 and the last term is 29. If the common difference is 3, how many terms are in the A.P?

  1. A.8
  2. B.9
  3. C.10
  4. D.11
Show the answer and explanation

Answer: C (10)

Explanation

29 = 2 + (n − 1) × 3 gives n − 1 = 9, so n = 10.