Greatest Common Factor
GCF (numbers up to 12)
GCF (numbers up to 25)
GCF (numbers up to 50)
GCF (numbers up to 100)
Least Common Multiple
LCM (numbers up to 6)
LCM (numbers up to 10)
LCM (numbers up to 12)
LCM (numbers up to 15)
LCM (numbers up to 20)
GCF & LCM Mixed
GCF & LCM (to standard)
GCF & LCM (smaller numbers)