[{"_id":1},{"_id":2},{"_id":3},{"_id":4},{"_id":5},{"_id":6},{"_id":7},{"_id":8},{"_id":9},{"_id":10},{"_id":11},{"_id":12},{"_id":13},{"_id":14},{"_id":15},{"_id":16},{"_id":17},{"_id":18},{"_id":19},{"_id":20},{"_id":21},{"_id":22},{"_id":23},{"_id":24},{"_id":25},{"_id":26},{"_id":27},{"_id":28},{"_id":29},{"_id":30},{"_id":31},{"_id":32},{"_id":33},{"_id":34},{"_id":35},{"_id":36},{"_id":37},{"_id":38},{"_id":39},{"_id":40},{"_id":41},{"_id":42},{"_id":43},{"_id":44},{"_id":45},{"_id":46},{"_id":47},{"_id":48},{"_id":49},{"_id":50}]

db.collection.aggregate([{$skip:10},{$limit:10},{$sample:{size:5}}])