Grades 5-6 Video Solutions 2021-video 2021 5-6/14

Video Transcription

Video Summary

In the problem, there are three hexagons with numbers at the vertices. The sum of numbers around each hexagon is 30, but some numbers are missing. By assigning variables to missing numbers and using the known sums, equations are set up: \( A + B = 18 \) for the left hexagon and \( C + D = 7 \) for the right hexagon. In the center hexagon, where the unknown is marked with a question mark, the equation is \( ? + 1 + A + B + C + D = 30 \). Plugging in the known values gives \( ? + 1 + 18 + 7 = 30 \), resulting in the unknown number being 4.

Keywords

hexagons

vertex numbers

equations

sum

missing numbers