A3. Manca wrote down all the three-digit numbers in which the digits 1, 4, and 7 appeared, each once. How many of these numbers are divisible by 2?
(A) 0
(B) 1
(C) 2
(D) 3
(E) 4
A3. A number is divisible by two if its last digit is even. From the digits 1, 4, and 7, we can form 2 numbers divisible by 2: 174 and 714.