How old was Samuel when he put in the temple?

This question needs some clarification.

* Samuel was not put in the Temple. He was a prophet and judge of Israel who lived long before the Temple was built. The Temple was built by King Solomon, many years after Samuel's death.

* There is no mention of Samuel's age when the Temple was built. The Bible focuses on his role as a prophet and judge, not on his age during the building of the Temple.

Perhaps you are thinking of a different story or figure?