Pattern recognition in Intro to Computing - Draw & Build Visually

Draw This - beginner

Look at the number sequence: 2, 4, 8, 16, 32. Draw a flowchart that shows how to find the next number in this pattern.

5 minutes

Hint 1

Hint 2

Hint 3

Hint 4

Grading Criteria

Start and End symbols present

Input step clearly shown

Process step multiplies input by 2

Output step shows the next number

Flow direction is clear and logical

Solution

  +-------+
  | Start |
  +-------+
      |
      v
+-----------------+
| Input last number|
+-----------------+
      |
      v
+---------------------+
| Multiply number by 2 |
+---------------------+
      |
      v
+-----------------+
| Output next num  |
+-----------------+
      |
      v
  +-----+
  | End |
  +-----+

This flowchart starts by taking the last number in the sequence as input. Then it multiplies that number by 2, because each number in the pattern is double the previous one. Finally, it outputs the next number and ends. This matches the pattern 2, 4, 8, 16, 32 where each number is twice the one before.

Variations - 2 Challenges

[beginner] Draw a flowchart to find the next number in the pattern: 3, 6, 12, 24, 48.

[intermediate] Draw a flowchart to find the next number in the pattern: 5, 10, 20, 40, 80, but include a decision step to check if the input number is positive before multiplying.