| 451 | Kang, Brendan | John Monash Science School | Clayton | Mathematical Methods | 50 |
| 452 | Kankanamalage, Gevin | Scotch College | Hawthorn | Mathematical Methods | 44 |
| 453 | Kannan Priya, Nisha | MacRobertson Girls High School | Melbourne | Mathematical Methods | 40 |
| 454 | Kannangara, Tanuli Lisara | Penleigh and Essendon Grammar School | Keilor East | Mathematical Methods | 42 |
| 455 | Kao, Naomi Pei Lin | MacRobertson Girls High School | Melbourne | Mathematical Methods | 44 |
| 456 | Kapatkar, Sanjeeth | Melbourne High School | South Yarra | Mathematical Methods | 47 |
| 457 | Kapoor, Sia | Highvale Secondary College | Glen Waverley | Mathematical Methods | 41 |
| 458 | Kapsalis, Joshua Kosta | Melbourne High School | South Yarra | Mathematical Methods | 45 |
| 459 | Karnati, Sriketan | Wellington Secondary College | Mulgrave | Mathematical Methods | 42 |
| 460 | Kartel, Alexander Darius | Melbourne Grammar School | Melbourne | Mathematical Methods | 46 |
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| 461 | Karve, Ved Niranjan | Ashwood High School | Ashwood | Mathematical Methods | 40 |
| 462 | Kautzky, Marco Alexander | Caulfield Grammar School Caulfield | St Kilda East | Mathematical Methods | 45 |
| 463 | Ke, Rui | Xavier College | Kew | Mathematical Methods | 46 |
| 464 | Ke, Sarah Zhujun | Genazzano F.C.J. College | Kew | Mathematical Methods | 41 |
| 465 | Kelly, Max Salvo | Melbourne Grammar School | Melbourne | Mathematical Methods | 40 |
| 466 | Keo, Andrew | Haileybury College | Keysborough | Mathematical Methods | 41 |
| 467 | Kernich, Ava Caroline | Luther College | Croydon Hills | Mathematical Methods | 41 |
| 468 | Khan, Mahboob | Box Hill High School | Box Hill | Mathematical Methods | 42 |
| 469 | Khan, Zuben | Balwyn High School | Balwyn North | Mathematical Methods | 40 |
| 470 | Khoury, Sebastian Gerard | St Bernards College | Essendon | Mathematical Methods | 45 |
| 471 | Kim, Claire | Camberwell Girls Grammar School | Canterbury | Mathematical Methods | 42 |
| 472 | Kim, Jamie | Melbourne High School | South Yarra | Mathematical Methods | 47 |
| 473 | King, Ned Charles | Wesley College St Kilda Rd | Melbourne | Mathematical Methods | 40 |
| 474 | Knight, Joel Owen | Salesian College Chadstone | Chadstone | Mathematical Methods | 43 |
| 475 | Knight, Oliver | Scotch College | Hawthorn | Mathematical Methods | 40 |
| 476 | Ko, Jack Ho Hin | Melbourne High School | South Yarra | Mathematical Methods | 40 |
| 477 | Kochuthara, Mathew Gregory | Parade College | Bundoora | Mathematical Methods | 41 |
| 478 | Koh, Leon | McKinnon Secondary College | McKinnon | Mathematical Methods | 42 |
| 479 | Kohn, Justin Charlie | Bialik College | Hawthorn | Mathematical Methods | 40 |
| 480 | Kollmorgen, Ashley Michael | Luther College | Croydon Hills | Mathematical Methods | 40 |
| 481 | Kong, Evan Jayden | St Andrews Christian College | Wantirna South | Mathematical Methods | 40 |
| 482 | Kooranpala, Thehan Devmith | Nossal High School | Berwick | Mathematical Methods | 40 |
| 483 | Kouroumalis, Benjamin Gerard | Mernda Central P-12 College | Mernda | Mathematical Methods | 40 |
| 484 | Kresnadi, Ben Gabriel | Xavier College | Kew | Mathematical Methods | 43 |
| 485 | Kriesner, Matthew Jie-Rong | Scotch College | Hawthorn | Mathematical Methods | 48 |
| 486 | Kucukozdemir, Ege Deniz | Wellington Secondary College | Mulgrave | Mathematical Methods | 40 |
| 487 | Kulkarni, Prisha | MacRobertson Girls High School | Melbourne | Mathematical Methods | 41 |
| 488 | Kumar, Devesh | Melbourne High School | South Yarra | Mathematical Methods | 40 |
| 489 | Kumar, Tahj Samuel | Melbourne Grammar School | Melbourne | Mathematical Methods | 50 |
| 490 | Kumbukage, Dinil Kenula | Melbourne High School | South Yarra | Mathematical Methods | 45 |
| 491 | Kunendra, Sachin Cheng-Hong | Camberwell Grammar School | Canterbury | Mathematical Methods | 44 |
| 492 | Kung, Tsun Yui Ryan | East Doncaster Secondary College | Doncaster East | Mathematical Methods | 41 |
| 493 | Kunze, Jacob Thomas | Trafalgar High School | Trafalgar | Mathematical Methods | 40 |
| 494 | Kurniawan, Jayden | John Monash Science School | Clayton | Mathematical Methods | 43 |
| 495 | Kuruwita, Deakin Reginald | St Josephs College Ferntree Gully | Ferntree Gully | Mathematical Methods | 42 |
| 496 | Lacey, Sophie Molly | Loreto Mandeville Hall | Toorak | Mathematical Methods | 41 |
| 497 | Laferlita, Jacob | Princes Hill Secondary College | Princes Hill | Mathematical Methods | 42 |
| 498 | Lagana, Ashwin | Camberwell Grammar School | Canterbury | Mathematical Methods | 45 |
| 499 | Lai, Ruijie | Carey Baptist Grammar School | Kew | Mathematical Methods | 43 |
| 500 | Lai, Tszkit | Caulfield Grammar School Wheelers Hill | Wheelers Hill | Mathematical Methods | 44 |