Question 20
Julia has cards 1, 2, 3, 4, 5. She chooses two disjoint pairs so that the sum of one pair equals the product of the other. Which card is certainly left unused?
Editorial consistency task: test whether any card is necessarily unused, retaining the original choices and source construction.
Original choices: A. 1; B. 2; C. 3; D. 4; E. 5
Editorial consistency task: test whether any card is necessarily unused, retaining the original choices and source construction.
Original choices: A. 1; B. 2; C. 3; D. 4; E. 5