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0 votes
6.6k views
in Reasoning by (144k points)

Consider the following matrix: 

3 8 10 2 ? 1
6 56 90 2 20 0

What is the missing number at '?' in the matrix? 

(a) 5 (b) 0 (c) 7 (d) 3

1 Answer

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by (138k points)
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Best answer

(a) In each column, let the number at the top be ‘x’

and the one at the bottom is ‘(x – 1)’. 

The relation between columns are given by

(x) (x – 1) = 3(3 – 1) = 6

Therefore, 5(5 – 1) = 20

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