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Class 11

Geometric Progressions and Special Sums, Quiz

Five questions on geometric progressions, the geometric mean and special sums. Pick one answer for each.

5 questions, one mark each. 3 to pass. Suggested time: 10 minutes. Your answers are not recorded.

  1. Find the 77th term of the GP 3,6,12,…3, 6, 12, \ldots
  2. Find the sum of the first 66 terms of the GP 2,6,18,…2, 6, 18, \ldots
  3. Find the sum to infinity of 8+4+2+1+⋯8 + 4 + 2 + 1 + \cdots
  4. Find the geometric mean of 44 and 2525.
  5. Find 12+22+⋯+1021^2 + 2^2 + \cdots + 10^2.
Unanswered questions are marked wrong.

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