LCM and GCF (2.3 Practice)

What is the least common multiple (LCM) of $$4$$ and $$6$$ ?

(a)  

What is the greatest common factor (GCF) of $$18$$ and $$24$$ ?

(a)  

Find the LCM of $$8$$ and $$12$$ ?

(a)  

Find the GCF of $$30$$ and $$45$$ ?

(a)  

If two buses leave a station at the same time, one returns every $$20$$ minutes and the other every $$30$$ minutes, after how many minutes will they both be at the station together again?

What is the LCM of $$5$$ , $$10$$ , and $$15$$ ?

(a)  

What is the GCF of $$14$$ and $$35$$ ?

(a)  

Find the LCM of $$9$$ and $$12$$ ?

(a)  

Find the GCF of $$16$$ and $$24$$ ?

(a)  

Sarah has $$24$$ red beads and $$36$$ blue beads. She wants to make identical necklaces using all the beads. What is the greatest number of necklaces she can make? Are you using LCM or GCF?

(a)   ​

What is the answer?​

​ (b)