The factors of
25 are 5,& 5.
30 are 5 & 6
35 are 5 & 7
'5' is a common factor to all three numbers . '6' & '7' are not common
Hence
5 x 5 X 6 X 7 = 1050 is the LCM * lowest common multiple.
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The LCM is: 175
there is none but if you took out the 25 then the LCM would be 7.
The Least Common Multiple (LCM) of 20, 30, and 35 is 420.
The LCM is 600.
The LCM is: 150