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This tool features a problem-solving activity in which you must transfer blocks of different sizes from one tower to another. The activity is based on a game invented by the French mathematician, Edouard Lucas, in 1883. The rules are that you can only move one block at a time and that a larger block may never lie on top of a smaller one.

"Everyone should know that many aspects of your online behavior are visible to others. This data is essential for all businesses with a presence on the Web; it enables them to determine how, where, and when to attract your attention, thus leading to smarter, targeted, and increasingly personalized Internet marketing. As more and more commercial entities turn to the Internet for customers, those potential customers unwittingly share personal information with a vast array of online parties through HTTP cookies. In this article, you will learn the function of third-party cookies, ad tracking, and how to block internet ad tracking."