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  3. Factors and Multiples
  4. Factors and Multiples of a Number
  5. Types of Numbers
  6. Twin Primes

Grade 6 Vietnam School Math Twin Primes

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Grade 6
1. Large Numbers (7-Digit to 9-Digits)
2. Roman Numerals (up to 1000)
3. Whole Numbers
4. Integers
5. Factors and Multiples
5.1. Factors and Multiples of a Number
5.1.1. Finding Factors of a Number
5.1.2. Finding Multiples of a Number
5.1.3. Word Problems on Factors and Multiples
5.1.4. Properties of Factors and Multiples
5.1.5. Types of Numbers
5.1.5.1. Odd and Even Numbers
5.1.5.2. Prime and Composite Numbers
5.1.5.3. Twin Primes
5.1.5.4. Prime Triplet
5.1.6. Co-Primes
5.1.7. Perfect Numbers
5.2. Tests of Divisibility
5.3. Prime Factorization of a Number
5.4. HCF and LCM
6. Fractions
7. Decimals
8. Simplification
9. Ratio and Proportion
10. Unitary Method
11. Algebraic Expressions
12. Linear Equations in One Variable
13. Mensuration
14. Geometry
15. Three Dimensional (3-D) Shapes
16. Linear Symmetry
17. Data Handling
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