Quantitative Aptitude – Number Systems – The numbers 1, 2,…,9 are arranged
Quantitative Aptitude – Number Systems
Question
The numbers 1, 2,…,9 are arranged in a 3 X 3 square grid in such a way that each number occurs once and the entries along each column, each row, and each of the two diagonals add up to the same value.
If the top left and the top right entries of the grid are 6 and 2, respectively, then the bottom middle entry is
Answer
3
Solution
From CAT 2017 – Quantitative Aptitude – Number Systems, we can see that,
The numbers cannot be repeated.
The grid looks like this
We have to find x. On solving, we get
The sum along the diagonals, columns and rows comes as equal.
Answer will be 3
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