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To find the total number of discs and what each friend received, calculate using the least common multiple of the fractions involved.
The total number of discs can be found by finding the least common multiple of 2, 3, and 4 (since you are splitting them into halves, thirds, and keeping 2). The least common multiple of 2, 3, and 4 is 12, so you had 12 discs in the beginning. 6 discs were given to Jorge (half of 12) and 4 discs were given to Ana (1/3 of 12).
The proportion given to Pilar can be calculated by subtracting what was given to Jorge and Ana from the total. Therefore, Pilar received the remaining 2 discs out of the initial 12, which is 2/12 or 1/6 of the total.
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