336
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60 6*9+6=60 7*8+4=60
(-56) / (-8) = 7
Or you could just multiply it by 1/6 7/48
169 is the smallest such number.
Remove the common factors. 6 = 3 x 2...as 3 is contained within the number 9 and 2 is contained within the number 8 then 6 is discarded. 4 is contained within the number 8 and is discarded 2 is also contained within the number 8 and is discarded. Take the product of the remaining numbers and subtract 1. (9 x 8 x 7 x 5 x 3) - 1 = 2520 -1 = 2519.......is the solution.