The night before the exam, sleep. A rested mind recalls what a tired one has only read.

Embedded and Hidden Figures — quick quiz

3 SOF IMO-pattern questions on Embedded and Hidden Figures. Instant scoring and solutions, no signup — see where you stand in a few minutes.

Question 1 of 3

Easy

Look at the complex figure shown below: A square is divided by its two diagonals. How many triangles are embedded in this figure?