Solution
A prime number is a number which has factors of 1 and itself.
Factors of 12 are 1,3,4 and 12.
Factors of 7 are 1 and 7.
Factors of 9 are 1,3 and 9
Factors of 4 are 1,2 and 4.
Hence, 7 is a prime number.
Create a FREE account and get:
- Download Maths Shortcuts PDF
- Get 300+ previous papers with solutions PDF
- 500+ Online Tests for Free
