How do you group 4 3 6 1 to have multiple of 5 and factor of 36 without changing order of numbers and using parenth?
Since 36 doesn't have any factors that are multiples of 5,
you're looking for two different groupings.
4 x 3 - 6 - 1 = 5, which is a multiple of 5.
4 x 3 + 6 x 1 = 18, which is a factor of 36.