VTMO 2021 — Grade 5 — cup Question 12

$48$ red and green marbles are split among four boxes. Red: green ratios are $A = 1 : 1 , B = 2 : 1 , C = 3 : 1 , D = 6 : 1$. Green counts are four consecutive natural numbers and total $20$ fewer than reds. Find each box’s counts.