CSAT 2021

Q. Following is a matrix of certain entries. The entries follow a certain trend row-wise. Choose the missing entry (?) accordingly.

7B 10A 3C
3C 9B 6A
10A 13C ?

(a) 9B
(b) 3A
(c) 3B
(d) 3C
Correct Answer: (c) 3B

Question from UPSC Prelims 2021 CSAT Paper

Explanation : 

Row 1 : 10 – 7 = 3
Row 2 : 9 – 3 = 3
Row 3 = 13 – 10 = 3, B was missing in row 3

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