NinetynineMixing solutions in a given ratio to find an unknown strength
CAT has tested this idea 5 times across 4 papers, from 2017 to 2021. Solve one, and the others are the same method with different numbers or wording, which is why repeated concepts are the most efficient thing to practise.
| Question | What it asks | Answer |
|---|---|---|
| CAT 2018 Slot 2 · QA Q11 near-repeat | 20% mixed 1:3 with S, then equal volume of 20% | A |
| CAT 2020 Slot 3 · QA Q18 near-repeat | A and B 1:3, then volume doubled with A; find B | B |
| CAT 2018 Slot 2 · QA Q3 | two drums mixed 3:4; find paint ratio in second drum | B |
| CAT 2017 Slot 2 · QA Q3 | milk:water bottles 7:2 and 9:4 combined to get 3:1 | B |
| CAT 2021 Slot 1 · QA Q11 | part of 33% bottle replaced by 17% solution to get 21% | 200 |
Part of Ratio, Mixtures & Averages (84 questions since 2017).