If you have only 100 uL and 200 uL pipettes, state how you make the following serial dilutions. The first 2 are straight dilutions,

a) 1:2

b) 1:3

c) 1:4

d) 1:6

e) 1:12

f) 1:18

I think the answer to a) is 100uL of sample and 100 uL of diluent and b) is 100 uL of sample and 200 uL of diluent.

I don't know how to continue to solve for c)... etc