Find Least Common Multiple of 26 and 91 using ladder method..

LCM( 26, 91 ) = 182

Step 1 : Place the numbers inside division bar:

Step 2 : Find a prime number which divides both numbers.

In this example we can divide by 13. If any number is not divisible by 13 write it down unchanged.

Step 4 : LCM is a product of numbers into L shape.

LCM = 13 · 2 · 7 = 182

This solution can be visualized using a Venn diagram.

The LCM is equal to the product of all the numbers on the diagram.