A man is 5 years older than his wife and the wife is now thrice as old as their daughter is 10 years old. How old was the man when his daughter was born
If the daughter is now 10 years old, and the wife is thrice her age, then the wife is 3 * 10 = <<3*10=30>>30 years old.
Since the husband is 5 years older than his wife, he is 30 + 5 = <<30+5=35>>35 years old.
The difference in age between the husband and the daughter is 35 - 10 = <<35-10=25>>25 years.
The husband was thus 25 years when his daughter was born. Answer: \boxed{25}.