5.4.1. Test Divisibility by 2
5.4.2. Test Divisibility by 3
5.4.3. Test Divisibility by 5
5.4.4. Test Divisibility by 6
5.4.5. Test Divisibility by 9
5.4.6. Test Divisibility by 10
7. Estimation
8. Fractions
9. Decimals
10. Money
12. Unitary Method
13. Geometry
16. Symmetry
17. Time
18. Calendar