Step-by-step explanation:
ABC
D ×
--------
1673
Dividing by an even number will always have a remainder so “d” cannot be even. The other possible factors are 3, 5, 7, and since 9 is divisible by 3 we need not consider it. Dividing by 3 or 5 leaves a remainder and so the only factor is 7. In fact 7*239 = 1,673 and hence a=2, b=3, c=9, and d=7!