HCF or LCM

Maths

This unit on factors, multiples, squares and cubes helps pupils build on their understanding that any positive integer can be expressed as a product of its factors. This skill is used in the next unit to explore multiplying and dividing with decimals.

In this unit, pupils learnt how to identify common factors and common multiples. in this unit, pupils build on this understanding to find the LCM and HCF

Properties of number: factors, multiples, squares and cubes

Sofia goes to her gran's every 6th day and goes to the park every 8th day.  Sofia wants to know on what day she does both.  Does she need to find the HCF or the LCM?

Sofia goes to her gran's every 6th day and goes to the park every 8th day.  Complete the statement: On the {{ }}th day Sofia does both.

Alex has 12 white flowers, 45 red flowers and 30 yellow flowers.  He wants to make identical bunches.  What is the greatest number of bunches he can make?  

Laura goes to a club every 4 days, Andeep goes every 12 days and Lucas goes every 10 days.  They all went today.  How can you work out how many days it will be until they all go on the same day again?

Laura goes to a club every 4 days, Andeep goes to the club every 12 days and Lucas goes every 10 days.  They all went today.  How many days will it be until they all go on the same day again? {{ }}

Which of the following is not a multiple of $$2^2\times3\times5$$?

Given $$12 = 2^2\times3$$, write 84 as a product of its prime factors.

The LCM of 70 and 42 is 210. The missing prime factor in the Venn diagram is {{ }}

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