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Answer
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LCM(140,180) is 1260

↓Steps Explained:↓

Calculate LCM for the following

(140,180)

List the first few multiples for 140

140,280,420,560,700,840,980,1120,1260,1400,1540,1680

List the first few multiples for 180

180,360,540,720,900,1080,1260,1440,1620,1800

LCM is the smallest common number:

LCM(140,180) is 1260GCF(140,180) = 20

Evaluate GCF

Since GCF ≠ 1, they are not relatively prime (co-prime)

Since GCF ≠ 1 and have a difference of two, the numbers are not twin prime

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