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SEAMO 2018 — Paper C — Grade 5–6 Question 3

SEAMO · SEAMO 2018 — Paper C — Grade 5–6

Question 3

Evaluate $\frac1{1\times2\times3}+\frac1{2\times3\times4}+\cdots+\frac1{99\times100\times101}$.
  1. $\frac{5049}{20200}$
  2. $\frac{10099}{20200}$
  3. $\frac12$
  4. $\frac{10099}{10100}$
  5. None of the above