HMMT 2005 C8
- Combinatorics
Every second, Andrea writes down a random digit uniformly chosen from the set . She stops when the last two numbers she has written sum to a prime number. What is the probability that the last number she writes down is 1 ?
Dataset text NuminaMath olympiads. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
Similar problems
These problems have the most words in common with this statement.