Math 1301
Number Theory and
Divisibility Rules
Objectives
• Use Number Theory to determine and use
Divisibility Rules
General knowledge:
Natural Numbers
Prime Numbers
Composite Numbers
What are the rules for divisibility by:
2?
3?
4?
5?
6?
7?
8?
9?
10?
LCD for
23
1264
and
Is it 1264?
GCF for
72x + 108
5
8
Summary
• Confident in ability to determine if a
number is divisible by any number from 210?
Practice!