Modelling & Discrete Structures
Topic overview
Formalise an unfamiliar situation, choose a representation and test boundary cases.
Key concepts
Supplementary assessment for some colleges; currently available public sources are insufficient to confirm the paper structure on this site. For preparation training only; no claim is made that it is a current full mock paper.
Key points
- ◆Follow the prerequisite knowledge requirements given by the examination body; new concepts may only be used when the question provides sufficient guidance.
- ◆The examples on this site are training with a limited scope and do not represent full syllabus coverage or official difficulty.
Worked examples
Try each example yourself before checking the explanation.
A lift serves floors 0 to 20. Moving one floor costs one unit of time; opening and closing doors costs four units per stop.
Compare serving requests 3, 7 and 12 in ascending order with returning to floor 0 after every request.
State two assumptions hidden in this model and explain their effect.
Propose a better objective than total time when passengers wait unequally.
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