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Grade 9 Flowcharts Worksheet with Answers

Grade 9 (US) · Year 10 (UK) · Class 9 (India) · Computer Science

Unit 3: AlgorithmsFlowcharts

Following flowcharts with decisions and loops to find the output for a given input. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Flowcharts

Grade 9 · Computer Science

Score___ / 12

Name

Class

Date

Learning goal: Flowcharts

Directions: Read each question carefully and write your answer on the line. Use the diagram to help you.

RememberFlowchart symbols

Start / StopovalProcessrectangleInput / OutputparallelogramDecisiondiamond: yes / no
  1. 1

    Follow the flowchart with x = 1. What is the output?

    StartInput x = 1x > 5?yesnox = x − 8x = x × 3Output xStop
  2. 2

    Follow the flowchart with x = 10. What is the output?

    StartInput x = 10x > 7?yesnox = x − 6x = x × 2Output xStop
  3. 3

    Follow the flowchart with x = 2. What is the output?

    StartInput x = 2x > 18?yesnox = x − 1x = x × 3Output xStop
  4. 4

    Follow the flowchart with x = 7. What is the output?

    StartInput x = 7x > 19?yesnox = x − 6x = x × 3Output xStop
  5. 5

    Follow the flowchart with x = 14. What is the output?

    StartInput x = 14x > 14?yesnox = x − 9x = x × 3Output xStop
  6. 6

    Follow the flowchart with x = 22. What is the output?

    StartInput x = 22x > 18?yesnox = x − 9x = x × 2Output xStop
  7. 7

    Follow the flowchart with x = 1. What is the output?

    StartInput x = 1x > 9?yesnox = x − 4x = x × 4Output xStop
  8. 8

    Follow the flowchart with x = 3. What is the output?

    StartInput x = 3x > 6?yesnox = x − 5x = x × 4Output xStop
  9. 9

    Follow the flowchart with x = 9. What is the output?

    StartInput x = 9x > 5?yesnox = x − 9x = x × 2Output xStop
  10. 10

    Follow the flowchart with x = 1. What is the output?

    StartInput x = 1x > 5?yesnox = x − 4x = x × 2Output xStop
  11. 11

    Follow the flowchart with x = 9. What is the output?

    StartInput x = 9x > 16?yesnox = x − 3x = x × 3Output xStop
  12. 12

    Follow the flowchart with x = 3. What is the output?

    StartInput x = 3x > 17?yesnox = x − 4x = x × 2Output xStop

★ Challenge corner for fast finishers

How many different patterns can 5 bits make?

168421

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/computer/9/flowcharts

Answer key (click to show)
  1. 1.3
  2. 2.4
  3. 3.6
  4. 4.21
  5. 5.42
  6. 6.13
  7. 7.4
  8. 8.12
  9. 9.0
  10. 10.2
  11. 11.27
  12. 12.6
  13. ★32 (challenge corner)

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