A B C x A A = A C 6 C A must be 1 because if it were as much as 2, the smallest ABC could be would be 201. Then we'd have 201 x 22 = 4422 but the product would then have to start with A=2. So A=1 So if we perform the multiplication we'd have this: 1BC x11 1BC 1BC0 1C6C From the 2nd from the right column in the addition part, either B+C=6 or B+C=16 if B+C=6 then the 2nd column from the left would be 1+B=C So we'd have the system of equationsBut that has solution B=5/2, C=7/2, which aren't digits. So B+C=16 and the only digits that have sum 16 are 7 and 9 Then there'd be 1 to carry to the 2nd column from the left, so 1+1+B=C or 2+B=C, so B=7 and C=9. So the solution is: 179 x11 179 1790 1969 Edwin