90
45,2
15,3,2
5,3,3,2
90
10,9
5,2,9
5,2,3,3
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The factor tree for 90 is as follows.90/\9•10/\ /\3•3 5•2So 90 as a product of its prime factors is: 2 • 3 • 3 • 5.
This is the factor tree of 270: 270 / \ 3 90 / \ 3 30 / \ 3 10 / \ 2 5 The 3's, 2, 5 would be prime so you would circle them.
From seconds to minutes: 1 minute/60 seconds For 90 seconds: (90 seconds)*(1 minute/60 seconds)=1.5 minutes
The greatest common factor of 99 and 90 is 9.
15 is a factor of 90 so their LCM is 90.