NinetynineTransfer between two holders changes the ratio; total stays fixed
CAT has tested this idea 3 times across 3 papers, from 2018 to 2025. 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 2025 Slot 3 · QA Q8 | coins 17:7 to 37:20 after moving 108; more to equalise | 272 |
| CAT 2025 Slot 1 · QA Q11 | 13:9 to 19:14 after 21 move; then new joiners 3:8 | D |
| CAT 2018 Slot 1 · QA Q26 | marbles 4:9 to 5:6; fraction Lalitha gave | D |
Part of Ratio, Mixtures & Averages (84 questions since 2017).