Applying LCM and HCF

Maths

HCF and LCM

Which number is missing from this prime factor tree?

2 packets of cups and 12 packets of plates

2 packets of cups and 3 packets of plates

2 packets of cups and 5 packets of plates

4 packets of cups and 3 packets of plates

There are 30 cups in a packet. There are 12 plates in a packet. Amir buys exactly the same number of cups and plates. What is the smallest number of each packet Amir can buy?

What is the smallest number of identical squares that will fit in this rectangle?

The HCF of two numbers is 6. If the LCM is 42 find the two numbers. You could use a Venn diagram to help. I've started this one for you . . . can you finish it?

Find 28 as the product of its prime factors.

True or False, Number A and B are 28 and 42?

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