Take each of the four digits 2, 3, 4, and 5 and arrange them in some way using standard arithmetic operations (addition, subtraction, multiplication, division, and exponentiation) to make 2025.
Solution:
The answer is: 34 x 52 = 81 x 25 = 2025.
Eric Erdman sent in a slightly different solution: (25)(34)
Correctly solved by:
| 1. Kamal Lohia | Hisar, Haryana, India |
| 2. Colin (Yowie) Bowey | Beechworth, Victoria, Australia |
| 3. Dr. Hari Kishan |
D.N. College, Meerut, Uttar Pradesh, India |
| 4. Davit Banana | Istanbul, Turkey |
| 5. Ivy Joseph | Pune, Maharashtra, India |
| 6. Cristobal Ruiz Gonzalez |
Central High School, Grand Junction, Colorado, USA |
| 7. Seth Cohen | Concord, New Hampshire, USA |
| 8. Uli Sandoval |
Central High School, Grand Junction, Colorado, USA |
| 9. Eric Erdman |
Northrop High School, Fort Wayne, Indiana, USA |
| 10. Arda Karahan |
Trabzon Science High School, Trabzon Province, Turkey |
| 11. Kelly Stubblefield | Mobile, Alabama, USA |