Question

find the missing number for certain rule is followed either row wise or column wise​

Answer 1

The required "option (A) 25" is the correct.

Step-by-step explanation:

The pattern follow row-wise,

(Second term -Third term) × 3 = First term

In first row,

(31 - 21) × 3 = 10 × 3 = 30

In third row,

(14 - 5) × 3 = 9 × 3 = 27

Similarly,

In third row,

(? -  18) × 3 = 21

⇒ ? -  18 = 7

⇒ ? = 18 + 7 = 25

Hence, the required option (A) 25 is the correct.