Le moindre grain de mil serait bien mieux mon affaire=--The smallest grain of millet would serve my needs better.
Oh, not that it interests me to know: other people's money-matters are le moindre de mes soucis!
I never talk about money; and what other people have is le moindre de mes soucis.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "moindre" in a variety of sentences. We hope that you will now be able to make sentences using this word.