Grades 1-2 Video Solutions 2020-2020Levels12prob23

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Video Summary

In this problem, numbers from 1 to 9 are placed on a cube's faces, with sums of numbers on opposite faces being equal. To find which number can be opposite the number 5, candidate numbers were tested. After examining different sums, it was determined that if 6 is opposite 5, the other sums are valid: opposite 4 is 7, and opposite 8 is 3, forming correct pairs with a sum of 11 (5+6, 4+7, 8+3). Other options failed to meet criteria due to repetition or exceeding number availability. Thus, 6 is correctly positioned opposite 5.