Skip to content / Đến nội dung
ThichHocToan.com

IMAS 2025-2026 Junior Division - First Round Question 3

IMAS · IMAS 2025-2026 Junior Division - First Round

Question 3

As shown in the diagram below, $ABC$ is a triangle, where $AD$, $BE$ and $CF$ are drawn from the vertices such that all three lines intersect at point $O$. If $\frac{EO}{EB}=\frac14$ and $\frac{FO}{FC}=\frac25$, what is the value of $\frac{DO}{DA}$?

Question illustration
  1. $\frac{13}{40}$
  2. $\frac7{20}$
  3. $\frac38$
  4. $\frac35$
  5. $\frac{17}{40}$