20.
Telemakhos was about a month old when Odysseus departed. He was gone for 20 years (10 at war and 10 at sea), so when Odysseus returned he was about 20.
Mentes was an old family friend of Odysseus' family, so Athena disguised herself as Mentes to go talk to Telemakhos. She needed to talk to Telemakhos and tell him to become a man and go look for news of Telemakhos' father, Odysseus.
Oh, dude, Telemachus was around 20 years old when Odysseus finally made it back from his wild adventures in Troy. Like, can you imagine waiting that long for your dad to come home? Talk about a serious case of FOMO.
Odysseus dressed up as an old beggar when he returned to Ithica.
Argos is Odysseus' dog. He was a puppy when Odysseus left to fight and Troy. When Odysseus returned to his kingdom disguised as a beggar, he found that his dog was old and really dirty. Odysseus could not show affection to Argos or he would give his disguise away. But once Argos saw Odysseus, he thumped his tail and could barley lift his head because he was so old. He caught sight of Odysseus and painlessly died, for he was finally at peace because he saw his master again. It is a beautiful moment in the epic poem.
The old hound had know that odysseus had returned becus the dog remembers his master smell.
picks up the scent of his master
About 48. Odysseus was one of the suitors of Helen in about 1201 BC. He was allowed to marry Penelope at that time as a result of his assistance in providing a husband for Helen in a safe way. Penelope may have been 13 at that time as this was the normal marriage for women. So her birth might have been about 1214 BC. Helen did not leave with Paris until about 1195 BC. The Trojan war did not start until about 1186 BC. So Penelope was about 28 at the start of the Trojan War. The war lasted ten years and Odysseus did not return for ten years after that. So when Odysseus returned to Ithaca in about 1166 BC, Penelope was about 48 years old.
The old hound Argos recognizes Odysseus by his scent after being away for twenty years. Despite being neglected and ill, Argos is able to muster the strength to acknowledge Odysseus one last time before passing away.
Odysseus was about 25 when he left Ithaca. So he returned at about 45.
Eumaeus, a loyal swineherd of Odysseus, helped disguise him as an old beggar when he returned to Ithaca in Homer's epic poem "The Odyssey." This disguise was part of Odysseus' plan to assess the situation in his home after being away for many years.
When Odysseus first returned home to Ithaca, the only person who recognized him was his old nurse, Eurycleia. She was able to recognize Odysseus by a scar he had received as a child from a boar's tusk. She saw the scar when she was washing Odysseus's feet and nearly told Penelope that Odysseus was there, but he stopped her. In addition, his dog also recognized his master Odysseus and then died.
When Odysseus first returned home to Ithaca, the only person who recognized him was his old nurse, Eurycleia. She was able to recognize Odysseus by a scar he had received as a child from a boar's tusk. She saw the scar when she was washing Odysseus's feet and nearly told Penelope that Odysseus was there, but he stopped her. In addition, his dog also recognized his master Odysseus and then died.