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Find the missing number in the addition of the following numbers, in base seven (begin{matrix}…

Find the missing number in the addition of the following numbers, in base seven
(begin{matrix}
4 & 3 & 2 & 1\
1 & 2 & 3 & 4\
* & * & * & *\
1&2&3&4&1
end{matrix})

  • A.
    3453
  • B.
    5556
  • C.
    6016
  • D.
    13453
Correct Answer: Option A
Explanation

4321(_7) + 1234(_7) = 5555(_7)

Missing number = 12341(_7) – 5555(_7)

= 3453(_7)

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