The LCM of the numbers 3, 7.2 and 0.64 is:
144
Converting to fractions: \(3=\tfrac31,\ 7.2=\tfrac{36}{5},\ 0.64=\tfrac{16}{25}\).
LCM of fractions: \(\dfrac{\text{LCM}(3,36,16)}{\text{HCF}(1,5,25)} = \dfrac{144}{1} = 144\).
Hence, the LCM of 3, 7.2 and 0.64 is 144.
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Important Questions from LCM and HCF
Six bells begin to toll together and toll, respectively, at intervals of 3, 4, 6, 7, 8 and 12 seconds. After how many seconds, will they toll together again?
A and B are two prime numbers such that A > B and their LCM is 209. The value of A 2 - B is:
Find the least number which when divided by 12, 18, 24 and 30 leaves 4 as remainder in each case, but when divided by 7 leaves no remainder.
Calculate the HCF of \(\frac{12}{5}\) , \(\frac{14}{15}\) and \(\frac{16}{17}\) .
Three numbers are in the proportion of 3 : 8 : 15 and their LCM is 8280. What is their HCF?
