Multiples and factors. Prime numbers
First and Second Year of Secondary Education
 
The Least Common Multiple of two numbers.

The least common multiple of several natural numbers is the smallest natural number that is a multiple of all those numbers at the same time, except for 0.
  Esta unidad interactiva requiere la máquina virtual de Java J2RE.
- Find the least common multiple of these two numbers, type it in the control box below and hit Enter.

- If the answer is correct, the message CONGRATULATIONS will appear.

- If you need a hint, click on the up and down triangles above and you will see the prime factor decomposition of each number, but in that case the message CONGRATULATIONS will have another colour.

- Click on Init, two other random numbers between 1 and 10 will appear.

 - Write down the accuracy and error rate in the 20 exercises. Write down the numbers and their least common multiple in your notebook.

  Esta unidad interactiva requiere la máquina virtual de Java J2RE.

- Find the least common multiple of these two numbers, type it in the control box below and hit Enter.
This window shows numbers from 1 to 100. You will need a pencil and a piece of paper because you may find it a bit more difficult than the previous one.

- Click on Init and two other numbers will appear. Work out several exercises until you master it without mistakes, do it in your notebook.
       
           
  Eduardo Barbero Corral
 
Spanish Ministry of Education. Year 2007
 
 

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