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Common multiple
A multiple (product), which is common to two or more numbers is called a common multiple.
Example:
1. Find the first common multiple of the numbers 8, 9 and 12.
 
GIF_8_9_12.gif
 
The first common multiple of 8, 9 and 12 is 72.
 
 
2. List first four common multiples of 3 and 6.
 
GIF_3_6.gif
 
The first our common multiples of 3 and 6 are 6, 12, 18 and 24.