The subtraction below is in base seven. Find the missing number.
5 1 6 2seven
-2 6 4 4seven
--------
2 * 1 5
--------
A
2
B
3
C
4
D
5
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
5 1 6 2seven
-2 6 4 4seven
--------
2 2 1 5
--------
the missing number is 2
Source: Myschool Past Questions Archive (Record #36585)