3024 decompose the common factor, and you get 3024 = 2×2×2× 2×3×3× 7. Divide this group of multiplied numbers into 4 groups, 2× 3, 7, 2× 2× 2, 3× 3. When you put them together, you will find the formula obtained by factorization just now, so the ages of the three of them are 6 7 8 9 respectively.