Mathadazzles are intriguing number puzzles that sharpen your logical reasoning and problem solving talents, and put to use your knowledge of familiar and not-so- familiar numbers and mathematical operations. Your job is to use clues to place fractions 1/10, 2/10, 3/10, 4/10, 5/10, 6/10, 7/10, 8/10, and 9/10 in the nine cells of a grid so that the numbers in rows and columns add to the circle sums at the ends of those rows and columns. No doubt you recall odd and even numbers, but do you know about abundant, deficient, and, oh yes, perfect numbers? What about prime numbers? Square numbers?...