It is: 1
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The LCM of both numbers is 60
The first number they both go into is 60. (Lowest Common Multiple = 60 = 12 X 5 & 15 X 4).
5 and 1 both go into 10 and 5.
3 Goes in to of 12 and 15 because 3 times 5 is 15 and 3 times 4 is 12!...So there u go...I hope I answered ir question!....Have a nice day! =)
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