Pretty sure one of them is some kind of echinopsis, no idea what kind doesnt seem to be columnar.
Out of the other 2, im sure the yellow one in the round pot is a parodia, no idea on the species. As for the other in the square pot, im hoping its one of the red blooming mammillaria shaped parodia species. If any of you know what they , id greatly appreciate it.
Just for clarity, the square pot plant doesnt seem to have secondary areoles near the tubercule, like mammilaria , escobaria and
And , photos will be provided if requested.