somebody is of the same age – кто-то одного возраста;
twice as old as somebody – вдвое старше, чем кто-то;
older than – старше чем;
younger than – младше чем;
somebody is long past fifty / well into one’s fifty – кому-то далеко за 50;
on the wrong (bad) side of fifty – старше 50;
on the right (good) side of fifty – младше 50;
in one’s middle twenties – около 25 лет;
somebody is nearing (approaching) forty – около 40;
somebody turned sixty – кому-то исполнилось 60.