Practicing Success
Find the missing number in the following figure
|
87 78 85 77 |
77 |
Column 1; (11, 14, 2, 39), => 11 + (14+2) = 39 Column 2; (12, 15, 3, 57), => 12 + (15+3) = 57 Column 3; (13, 16, 4, ?), => 13 + (16+4) = 77 Thus, "77" is correct. |