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UI Post-UTME Mathematics 2018 (Model questions) Question 47

Question 47

Progressions

Find the sum of all the multiples of 7 between 0 and 300

  1. A.294
  2. B.6321
  3. C.2058
  4. D.2107
Show the answer and explanation

Answer: B (6321)

Explanation

7, 14, …, 294 is an AP of 42 terms, so the sum is 42/2 × (7 + 294) = 6,321.