The subtraction below is in base seven. Find the missing number.
5 1 6 2seven
-2 6 4 4seven
——–
2 * 1 5
——–
-
2
- 3
- 4
- 5
The correct answer is: A
Explanation
5 1 6 2seven-2 6 4 4seven
--------
2 2 1 5
--------
the missing number is 2