Question 20
The six-digit number $\overline{7A34B4}$ is divisible by 36. If digit $B$ is prime, find digit $A$.
Answer format: enter one whole number without units; leading zeros are optional. The source answer sheet uses four digits (for example, 7 is shaded as 0007).
Answer format: enter one whole number without units; leading zeros are optional. The source answer sheet uses four digits (for example, 7 is shaded as 0007).