Two high school students not only conquered calculus, they pulled off an achievement that can stump college professors. Of the 302,532 students around the world who took the Advanced Placement ...
How many fifth-graders in the U.S. took the AP Calculus AB exam last year? Radu Rosu of Chapel Hill wanted to find the answer. He knew of one child who did - his 10-year-old son, Paul Rosu, who earned ...
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