Loan repaid in instalments under compound interest

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 2 · QA Q18	1000 repaid by 530 and 594; find rate	A
CAT 2018 Slot 1 · QA Q15	two equal annual instalments at 10%; find instalment	121000
CAT 2023 Slot 2 · QA Q12	half-yearly compounding; part repaid after year 1	B

Part of Interest (19 questions since 2017).