Writing a number as m^n: n must divide every prime exponent
CAT has tested this idea 3 times across 3 papers, from 2018 to 2024. 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 2024 Slot 2 · QA Q3 | m^n = 2^25 × 3^40; n is 5 | C |
| CAT 2023 Slot 2 · QA Q1 | a^m b^n = 144^145; maximise n − m | C |
| CAT 2018 Slot 2 · QA Q7 | N^N = 2^160; largest power of 2 dividing N^2 + 2^N | 10 |
Part of Logarithms & Exponents (55 questions since 2017).