Any multiple of 840.
LCM(3, 5, 7) = 105
Three and five-sevenths is the same as 26/7, so the reciprocal is 7/26.
21
21
7 pts
innocently
Any multiple of 140.
The numbers 5, 7, and 4 can all go into their least common multiple (LCM). The LCM of 5, 7, and 4 is 140. This means that 140 is the smallest number that is divisible by all three of them. Thus, any multiple of 140 will also be a common multiple of 5, 7, and 4.
The numbers 5, 7, and 3 all go into their least common multiple (LCM), which is 105. This means that 105 is the smallest number that is a multiple of all three numbers. In general, any multiple of 105 will also be divisible by 5, 7, and 3.
975
35 and all of its integral multiples
21 is the LCM since the numbers have no common factors except 1.