Estimate halves, thirds and fractions of a line without a ruler. Play ten free Line Split rounds with tilted lines and increasingly tricky proportions.
Read the requested fraction and starting end. Move each divider along the line with the pointer or arrow keys, then lock your split to reveal the correct positions.
Halves lead to thirds and fractions such as two thirds, three quarters and four fifths. Tilted lines make the horizontal screen distance less useful as a reference.
Divide the line mentally into equal parts before combining the required number. Follow the line itself when it tilts.
Ten rounds add up to an Instinct Score of 0–1000. Round limits rise from 40 to 220 points. Instinct’s Core separately measures how accurately you predicted your rank; it waits for at least 30 other comparable attempts. These games are informal benchmarks, not a diagnostic assessment.