The subtraction below is in base seven. Find the missing number. 5 1 6 2
MATHEMATICS
WAEC 2010
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
Correct Answer: A. 2
Explanation
5 1 6 2seven
-2 6 4 4seven
--------
2 2 1 5
--------
the missing number is 2
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