The HCF is 9
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It is: 9
Prime factor each number. 18=2x3x3 45=3x3x5 72=2x2x2x3x3 Use each prime factor the number of times it was used the MOST in any one of the numbers. 2x2x2x3x3x5=360 The least common denominator of 18, 45, and 72 is 360.
Least Common Multiple (LCM) for 72 108 is 216.
2 is a common factor of 24 and 72.
Both can be divided by 3 72 / 3 = 24 45 / 3 = 15 and divided by 9 as well 8 x 9 = 72 5 x 9 = 45