Puzzle
NumberPuzzle
Code breaker:HCF and LCM
Thirteen pairs of numbers, alternating highest common factor and lowest common multiple. The Code Box includes products such as 6 × 9 = 54, so multiplying the two numbers unlocks the wrong letter. Two per A4.
A free key stage 3 and GCSE number puzzle with answers, spec code N4. It goes with the lessons on highest common factor: Venn diagrams, lowest common multiple: Venn diagrams and HCF and LCM: the ladder method.
Lesson
Highest common factor:Venn diagrams
Lesson
Lowest common multiple:Venn diagrams
Lesson
HCF and LCM:The ladder method
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