AMO 2027 Grades 8-9 SET 12 - Self-study Question 5

Question 5

1. The number $2\times p$ is an even number.
2. The number $p\times p$ is not a prime number.
3. The number $2\times p+3$ is an odd number.
4. The number $3\times p+p$ is not a prime number.
5. The number $p+1$ is an even number.