Count Accepted Results

Supplied materials

• Paper and pencil; an adult may read aloud. No device, account or purchase is needed.

Learn the idea

Combining validation with counting requires a clear order. First decide whether an input is allowed; only then decide whether it meets the goal. A count of reached results is not the sum of page numbers and is not the number of all records. Increment the counter once for each qualifying record.

Use whole-number page inputs [9, 10, 31, 12, −1, 0]. Accept only 0 through 30 and count accepted values at least 10. Algorithm: set reached_count = 0; for each pages, if pages is valid and pages ≥ 10, add 1; show reached_count. Invalid values contribute zero even when numerically large.

1. Create columns pages, valid?, meets goal?, and running count.
2. Start reached_count = 0 before the loop.
3. For each value, validate before checking the goal.
4. Compare the final count with the qualifying inputs you circled.

Check your reasoning

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Take it further

Change the goal threshold to 12 for the original list. Expected count: 1, from input 12 only; 31 remains invalid.

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