Question 18
In this cryptarithm, different letters represent different digits. What is the value of the four-digit number ABCD?
$$\begin{array}{rrrrr} &A&B&C&D\\ \times&&&&D\\ \hline &D&C&A&A\end{array}$$
A and D are nonzero because both displayed numbers have four digits.
Answer entry: enter the whole number only, without units. The paper uses four shaded digits with leading zeros; ordinary integer entry is accepted here.
$$\begin{array}{rrrrr} &A&B&C&D\\ \times&&&&D\\ \hline &D&C&A&A\end{array}$$
A and D are nonzero because both displayed numbers have four digits.
Answer entry: enter the whole number only, without units. The paper uses four shaded digits with leading zeros; ordinary integer entry is accepted here.