Grades 7-8 Video Solutions 2026-2026_7-8

2026_7-8_26

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Video Summary

A 4×4×4 cube has surface area 96. To increase this by 50%, the new surface area must be 144, an increase of 48. Removing one small cube can increase surface area by at most 4, since one exposed face is lost but five new faces are exposed. Therefore, the fewest cubes needed is 48 ÷ 4 = 12. The answer is 12.