LCM or Least Common Multiple

Entering lcm(Number1, Number2) will return the least common multiple of the two numeric values. The lcm function will only accepts two values at a time.


Find the LCM for 10, 15, and 45.

  1. Press [ CAS] key
  2. Enter lcm(10,15) and press [Enter] key.
  3. It should display the result of 30.
  4. Enter lcm(30,45) and press [Enter] key.
  5. It should display the final result of 90.

Since LCM can only accept two entries at a time, find the LCM of the first two values, and then find the LCM of your answer and the third value.