O-LevelComputer ScienceAlgorithm design and problem-solving2210/22 · Oct/Nov 2018 · Q29 Marks
Write an algorithm, using pseudocode, to input three different numbers, multiply the two larger numbers together and output the result. Use the variables: Number1, Number2 and Number3 for your numbers and Answer for your result.
- (a)Write an algorithm, using pseudocode, to input three different numbers, multiply the two larger numbers together and output the result. Use the variables: Number1, Number2 and Number3 for your numbers and Answer for your result.[5]
- (b)Give two sets of test data to use with your algorithm in part (a) and explain why you chose each set. Test data set 1 Reason Test data set 2 Reason[4]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.
- [1] Use of correct variables
- [1] Input 3 numbers
- [1] Check all 3 input numbers are different
- [1] Attempt to find the largest two numbers input
- [1] Correctly finding the largest two numbers
- [1] Multiply their two largest numbers together and assign to variable
- [1] Output the result of the multiplication
- [1] 7,7,7
- [1] should be rejected as numbers are equal
- [1] 7,8,9
- [1] normal data answer should be 72
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