Răspuns :
1. 16 = 2 × 8
16 = 2 × 2 × 4
2. 27 = 3 × 9
27 = 3 × 3 × 3
3. 20 = 2 × 10
20 = 2 × 2 × 5
4. 56 = 2 × 28
56 = 2 × 2 × 14
56 = 2 × 2 × 2 × 7
5. 64 = 2 × 32
64 = 2 × 2 × 16
64 = 2 × 2 × 2 × 8
6. 81 = 3 × 27
81 = 3 × 3 × 9
81 = 3 × 3 × 3 × 3
Răspuns:
27=3×9
27=3×3×3
20=2×10
20=2×2×5
56=7×8
56=8×2×4
64=8×8
64=2×4×8
81=9×9
81=3×3×9