A gambling game in which numbered tickets are sold and prizes are awarded on the basis of chance. Lotteries are usually run by governments or private organizations, and may be based on chance, skill, or other criteria. Prizes can be cash, goods, or services. Lottery is often used to raise funds for public projects, such as building roads, canals, or schools. It can also be used to award scholarships or prizes for research. In the United States, state governments have exclusive rights to conduct lotteries.

Many people purchase lottery tickets as a low-risk investment with the hope of winning big money. In reality, however, winning the lottery is almost always a longshot. And every time someone purchases a ticket, they contribute billions to government receipts that could be better spent on things like education, retirement, or fighting wars.

Most of the money from lottery ticket sales is used to pay the winners, but a significant portion must be deducted for costs and promotion. As a result, most lotteries have relatively few large prizes. Potential bettors seem to be attracted to the idea of a large prize, and ticket sales increase dramatically for rollover drawings that offer an additional opportunity to win.

The oldest known lotteries were held in the 15th century, and town records from Ghent, Bruges, and Utrecht refer to raising funds for wall construction and charitable aid. In colonial America, Benjamin Franklin organized a lottery in 1748 to help fund Boston’s Faneuil Hall and John Hancock ran a lottery in 1767 to help build the road over a mountain pass in Virginia. The lottery was the first major way for the colonies to finance both private and public ventures.