摘要
在一次狗展上，狮子狗的数量至少是猎兔犬数量的1/5，至多是牧羊犬数量的1/6；而且狮子狗和猎兔犬的数量至少有23只．请问在这次狗展上的牧羊犬至少有多少只？
Of the animals entered in a dog show, the number of poodles（狮子狗） is at least one--fifth （五分之一） of the number of beagles （猎兔犬 ） and at most one--sixth the number of collies（牧羊犬）. The number of dogs that are poodles or beagles is at least 23. Find the minimum number of collies entered in the show.
