How this could have been used in the story or is used it maybe to show how he escaped these things that would have lead him to death with the first on saying his age was 18 instead of 15 and his father said he was 40 instead of 50 so they would be more useful and not get sent to the gas chambers.

Evade or escape from a danger, enemy, or pursuer typically in a skillful or cunning way.

People that where in a war probably had to elude from a lot of things to stay safe

If you elude the danger in your life you will be more safe and better off.