What factors and multiples are
3 is a factor of 12, and 12 is a multiple of 3.
Factor: a whole number that divides a number with no remainder. Multiple: a number times a whole number. Example: 3 × 4 = 12.
Watch 2 lists find the GCF and the LCM
GCF (greatest common factor): the largest factor that 2 numbers share. LCM (least common multiple): the smallest multiple that 2 numbers share.
Word problems: Use the GCF to split items into the largest equal groups. Use the LCM to find the first time 2 repeating events happen together.
Try it
Mark multiples on a 1 to 60 grid
- Pick 2 numbers.
- Pick a color.
- Click every multiple of that number on the grid.
- Do the same for the other color.
- Find the first number with both colors. That number is the LCM.
2 numbers
Color
Quick check
Answer 5 questions. You see your score at the end.