2. Arithematic
2.1. Numbers
2.1.1. Successor and Predecessor
2.1.2. Odd and Even Numbers
2.1.3. Prime and Composite Numbers
2.1.3.2. Composite Numbers
2.1.3.3. Prime Numbers
2.1.3.5. Twin Primes
2.1.3.6. Prime Triplet
2.1.3.7. Co-Primes
2.3. Fractions
2.5. Decimals
2.6. Unitary Method
2.7. Rounding Numbers
2.8. Percentage
2.9. Profit and Loss
2.10. Simple Interest
2.12. Mensuration
2.13. Time
2.14. Data Interpretation
Navodaya Vidyalaya Navodaya Vidyalaya Understanding Prime and Composite Numbers
Master this topic as part of Prime and Composite Numbers