Find the missing number from the below options.
12
24
36
​

16
32
48
​

18
?
54
​

Let's analyze the relationships column-by-column:
Column 1:

Row 1: 12

Row 2: 24=12×2

Row 3: 36=12×3

Column 2:

Row 1: 16

Row 2: 32=16×2

Row 3: 48=16×3

Column 3:
Following the same established rule (Row 2=Row 1×2 and Row 3=Row 1×3):

Row 1: 18

Row 3: 54=18×3

Therefore, Row 2 must be: 18×2=36