prob­soln – Gen­er­ate prob­lem sheets and their so­lu­tion sheets

The pack­age is de­signed for lec­tur­ers who have to gen­er­ate new prob­lem sheets for their stu­dents on a reg­u­lar ba­sis (e.g. yearly) by ran­domly se­lect­ing a spec­i­fied num­ber of prob­lems de­fined in an­other file.
The pack­age al­lows you eas­ily to gen­er­ate a new prob­lem sheet that is dif­fer­ent from the pre­vi­ous year, thus al­le­vi­at­ing the temp­ta­tion of stu­dents to seek out the pre­vi­ous year's stu­dents and check­ing out their an­swers. The so­lu­tions to the prob­lems can be de­fined along with the prob­lem, mak­ing it easy to gen­er­ate the so­lu­tion sheet from the same source code; prob­lems may be reused within a doc­u­ment, so that so­lu­tions may ap­pear in a dif­fer­ent sec­tion of the same doc­u­ment as the prob­lems they cover.