0580/12 Feb/Mar 2022, Question 20: Constructing Equations
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
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The question, in short
Balavan starts with n marbles, gives n/5 to his sister and n/2 to his cousin. Write a simplified expression in terms of n for the marbles he has left.
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Solution · 2 marks
- 1n − n/5 − n/2
- 2= 10n/10 − 2n/10 − 5n/10
- 3= (3/10)n
Answer(3/10)n
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