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CBSE Maths · Class 9

Chapter 8: Predicting What Comes Next: Sequences and Progressions

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Date: ______________
Marks: ____ / 6

Arithmetic and geometric progressions, general terms, sums.

Questions

  1. Is 1,4,7,101, 4, 7, 10 AP?
  2. 20th term of AP 5,9,13,…5, 9, 13, \ldots
  3. Sum of first 10 terms of AP 2,5,8,…2, 5, 8, \ldots
  4. 4th term of GP 3,6,12,…3, 6, 12, \ldots
  5. Common difference of 10,7,4,110, 7, 4, 1?
  6. AP with a=2,d=5a=2, d=5, find a7a_7.

Extra Practice (Optional)

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Answer Key (For Teachers)

  1. Answer: Yes
    Working: Common diff 3.
  2. Answer: 8181
    Working: a=5,d=4a=5, d=4.
  3. Answer: 155155
    Working: Formula.
  4. Answer: 2424
    Working: r=2r=2.
  5. Answer: −3-3
    Working: Subtract.
  6. Answer: 3232
    Working: 2+6⋅52+6\cdot 5.
Gyaan Maths · CBSE Class 9 · Chapter 8
Gyaan Maths — CBSE Class 6-12, built for board-toppers.
v1.1 · Sept 2026