VTMO 2026 - Grade 2 - Final - SET 1 - Self-study Question 17

The bar chart shows the numbers of cards owned by Tí, Sửu, Dần and Mão, but the bars are not labelled with names. Tí has 10 more cards than Sửu. Dần does not have the fewest cards. How many cards does Mão have?