The flowchart shows an algorithm that is used to input 50 numbers. Each number is stored in the variable Value when it is input. Any number input that is less than or equal to –20 or greater than or equal to 50 is rejected and re-input. The accepted numbers are added together as they are entered and the total and average of these numbers are output at the end of the algorithm.

Mark scheme

Marking points from the official mark scheme (May/June 2025). The mark or mark type is shown in brackets.

1. [6] (a) One mark per mark point, max six MP1 input Value MP2 correct check that Value is between -20 and 50, exclusive MP3 totalling values MP4 counting number of values MP5 checking Count = 50/ >= 50 MP6 output of total and average
2. (a) Flowchart (completed nodes, top to bottom, left to right for loops): 1. Input box: INPUT Value 2. Decision box: IS Value <= -20 OR Value >= 50 ? (Yes/No) 3. Rectangle after 'No': Total ← Total + Value 4. Rectangle after 'Total': Count ← Count + 1 5. Decision box: IS Count = 50 ? (Yes/No) (leading to OUTPUT Total / OUTPUT Total/50 or back to input) 6. Output box: OUTPUT Total 7. Output box: OUTPUT Total/50
3. [4] (b) One mark per statement MP1 Change INPUT Value so that it saves values into an array MP2 using the counter as the index MP3 Outside the (first) loop, set up a loop that will iterate 50 times MP4 Use an output statement inside the (second) loop to output the contents of the array, using the counter as the index.