The Hidden Rule: (4, 131, 5) | explainer video made with ngram

About the video

This explainer video was made with ngram to walk through a numeric puzzle step by step. The video presents two sets of numbers and asks what hidden rule connects the outer values to the middle one. It first tests a simple guess—adding the cubes of the outer numbers—and shows why the leftover amounts don't form a consistent pattern. It then reveals the real rule: raise the first number to the fourth power and subtract the cube of the last number. This is verified against the example (4 and 5 giving 256 minus 125 equals 131) and a second set (2 and 3 giving 16 minus 27 equals negative 11), confirming the pattern holds. The video then checks several multiple-choice answer options by applying the same formula, ruling out pairs like 8 and 9, 2 and 4, and 2 and 7 before confirming that 6 and 7 produce 1296 minus 343, equal to 953. The final answer is identified as option C, the rule being first number to the fourth power minus the last number cubed. Motion graphics are used throughout to display the equations and highlight each step of the calculation as the logic unfolds.