DIVISIBILITY

THE DIVISIBILITY RULES

Las reglas de divisibilidad sirven para saber si un número es divisible por otro sin necesidad de hacer la división

Exercise 1. Click the following link and read the rules of divisibility for numbers 2, 3, 5 and 11. Write down the rules in your notebook in English.

 


Exercise 2. Click the following link and do all the exercises. Click the green arrow when you finish each exercise.

PRIME AND COMPOSITE NUMBERS

Exercise 3. Listen the following video. Write in your notebook the words you can understand. Don't panic!!! You can listen it many times, and stop the video if you want!!

 

 

PRIME NUMBERS - THE SIEVE OF ERATOSTHENES

Exercise 4. Listen to the following video. Write in your notebook the words you can understand and explain in Spanish what you think the video is saying.

Exercise 5. Write a list with the prime number until 100. Use the Sieve of Eratosthenes!!

   

LEAST COMMON MULTIPLE (LCM).