In the addition of two 2- digit numbers, each blank space, including those in the answer, is to be filled with one of the digits 0,1,2,3,4,5,6, each used exactly once. The units digit of the sum is
Answer Choices
A. 2
B. 3
C. 4
D. 5
E. 6
In the addition of two 2- digit numbers, each blank space, including those in the answer, is to be filled with one of the digits 0,1,2,3,4,5,6, each used exactly once. The units digit of the sum is
Answer Choices
A. 2
B. 3
C. 4
D. 5
E. 6