Mathematics
Natural numbers
Revision of the Primary School Curriculum
Least common multiple
Divisibility by 2, 5 and 10
The greatest common factor. Coprimes
Decomposition of composite numbers into prime factors
Divisibility by 3, 9
Prime numbers, composite numbers. Eratosthenes's sieve
Factors and Multiples of Natural Numbers
Algebraic expressions
Main properties of divisibility