18
In Oklahoma the minimum age for betting on a horse is 18. This is generally the case to bet in casinos too, however some can be a minimum of 21 years.
The answer depends upon the race. Most races will set a minimum age of 14 or 18, depending upon whether they want to include HS age athletes or not. Some races will not specify a minimum age, but will require younger athletes to be accompanied by a parent, who is also registered in the race. All of those decisions are made with liability issues in mind and will be strictly enforced.
21
21.
Thirty years old.
17 yrs
A local realtor can answer your question.
1980
30 years old.
Apparently, in Oregon, the minimum age to enter a casino is 18. Each casino sets a different minimum age -- 18 to 21 -- for betting and playing games in the facility. Their Web site does not list a minimum age, but you can follow the link, below, to find their 800 phone number to call and get the answer you want.
In Maryland the legal age for buying lottery tickets, for pari-mutuel betting, for charity bingo, and pull-tabs is 18. The minimum age for slot machines and casino gambling is 21.
I'm pretty sure 18.