What is the LCM of 25 30 and 35?

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.