840 = 1×840=2×420 = 3×280 = 4×210 = 5×168 = 6×140 = 7×120 = 8×105
4220=1×4220 = 2×2110 = 4×1055 = 5×844
2840 = 1×2840 = 2×1420 = 4 × 710 = 5 × 568 = 8 × 355
One solution let's find that
Answer:
6
Step-by-step explanation:
7 x 6 = 42 + 9 = 51 + 54 = 105 + 75= 180
b
