[{"firstname":"temi","lastname":"lan","email":"temiian@gmail.com","gender":"female","active":true,"age":16},{"firstname":"adam","lastname":"Ian","email":"adamian@gmail.com","gender":"male","active":false,"age":17},{"firstname":"eve","lastname":"Lan","email":"evelan@gmail.com","gender":"female","active":true,"age":20},{"firstname":"mathew","lastname":"silva","email":"mathewsilva@gmail.com","gender":"male","active":false,"age":25}]

db.collection.aggregate([{$sort:{"age":-1}}])