Grades 3-4 Video Solutions 2022-2022_3-4

Video Transcription

Video Summary

The problem involves determining the number hidden under a black square within a grid, using given sums for each row. By analyzing the relationships between rows containing gray and white squares, it's found that one gray plus one white equals 20. In the target row, which includes a gray, white, and black square, the sum equals 32. Knowing gray plus white equals 20, the equation 20 plus the black square must equal 32. Solving this, the black square is determined to be 12. Thus, the hidden number under the black square is 12.

Keywords

grid puzzle

hidden number

row sums

equation solving

black square