VTMO 2026 - Grade 4 - Final - SET 1 - Self-study Question 1

Bình starts with $\frac{1+2+3+4+\cdots+9}{21+22+23+24+\cdots+29}$. He removes one term from the numerator and one term from the denominator so that the remaining fraction is $\frac15$. What is the sum of the two removed numbers?