P6 / Nanyang / 2019 / SA2 / Paper 2 – Q17 [5 marks]

Question:

Joong Ki, Minho and Ali have some green and some red buttons. Joong Ki has 9 more buttons than Minho. Minho has 5 more green buttons than Joong Ki. The ratio of the number of red buttons that Joong Ki has to the number of red buttons that Minho has is 5 : 3. The ratio of the number of green buttons to red buttons Ali has is 3 : 1.
(a) How many red buttons do Joong Ki and Minho have altogether?
(b) Each statement below is either true, false or not possible to tell from the information given. For each statement, put a tick (✓) to indicate your answer.