VTMO 2026 - Grade 6 - Semifinal - SET 11 - Self-study Question 3

VTMO · VTMO 2026 - Grade 6 - Semifinal - SET 11 - Self-study

Question 3

Find the prime numbers $x,y$ such that $x^2=y^2-45$.

1. $x=6;\ y=9$
2. $x=2;\ y=7$
3. $x=36;\ y=81$
4. $x=4;\ y=49$
5. $x=22;\ y=23$