According to 1 Timothy 5:9, a widow should be enrolled only if she is at least how old?

Answer: Sixty

A widow was to be enrolled if she was at least sixty years old (KJV: threescore), faithful to her husband, and known for good deeds.

“A widow should be enrolled if she is at least sixty years old, faithful to her husband,”— 1 Timothy 5:9 (BSB)