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What are the highest common factors and lowest common multiples of these?

April 26, 2017common factors Highest lowest Mathematics multiples

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What are the highest common factors and lowest common multiples of these?

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1. 24= 3×8=12×2=4×6=24×1 18= 2×9=18×1=3×6 common factors of 24 and 18 are 1,2,3, and 6 for LCM 24=24,48, 72, 96, 120 18=18,36, 54,72,90 HCF= 6 LCM=72 answer 2. 24 and 36 24=3×8=12×2=4×6=24×1 36= 6×6=12×3=18×2=4×9=36×1 common factors of 24 and 36 are 1,2,3,6,and12, for LCM 24=24,48,72,96120,144,168,192 36=36,72,108,144 HCF=12 LCM=72 and 144 answer 3. 9 and 45 9=9×1=3×3 45=9×5=45×1=3×15 common factors of 9 and 45 are 1,3, and 9 for LCM 9= 9,18,27,36,45,54,63,72,81,90 45=45,90,135,180 HCF=9 LCM=45 and 90 answer 4 16 and 12 16= 2×8=4×4=16×1 12=3×4=2×6=12×1 common factors of 16 and 12 are 1,2, and 4 16=16,32,48,64,80,96,112 12=12,24,36,48,60 HCF=4 and LCM= 48 answer 5. 25 and 15 25=5×5=25×1 15=3×5=15×1 common factors of 25 and 15 are 1 and 5 25= 25,50,75,100,125 15=15,30,45,60,75 HCF=5 and LCM=75 answer 6.