2025 IGCSE 0580 May/June P41 Q10

2025 IGCSE 0580 May/June P41 Q10

6 marks
  1. Write down all the factors of \(18\).[2]
  2. Factorise.
    \(3y-xy+15-5x\)[2]
  3. \(3y-xy+15-5x=18\)
    where \(x\) and \(y\) are positive integers.
    Using your answers to part (a) and part (b), find one possible value of \(x\) and the corresponding value of \(y\).[2]

Solution:

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Answer:(a) \(1,2,3,6,9,18\). (b) \((y+5)(3-x)\). (c) \(x=1,y=4\), or \(x=2,y=13\).

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