You may also find remaining question solution of CAT 2018, slot 1 by searching the question in the search bar.
Q. 1: What is the minimum number of different numerals needed to ?ll a 3×3 square matrix?
As per the information, we’ve the following diagram for a 3 x 3 matrix to have minimum number of numerals.
So, we require 4 elements to have all different numerals. Ans : 4
As per the information, we’ve the following diagram for a 5 x 5 matrix to have minimum number of numerals.
So, we require 4 elements to have all different numerals. Ans : 4
Q. 3: Suppose you are allowed to make one mistake, that is, one pair of adjacent cells can have the same numeral. What is the minimum number of different numerals required to ?ll a 5×5 matrix?
1. 16
2. 4
3. 25
4. 9
Even if one mistake is allowed, then also there won’t be any change in the solution given above. Ans : 4
Q. 4: Suppose that all the cells adjacent to any particular cell must have different numerals. What is the minimum number of different numerals needed to fill a 5×5 square matrix?
1. 9
2. 16
3. 4
4. 25
Given that all the cells adjacent to any particular cell must have different numerals, which is satisfied only
when there are at least 9 numerals. Ans : 9
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