Question

1. \

$$\begin{tabular}{|c|c|c|c|c|c|} \\hline input & 5 & 2 & 6 & 9 & \\\\ \\hline output & 45 & 18 & 54 & 81 & 63 \\\\ \\hline \\end{tabular}$$

Explanation:

Step1: Find the relationship between input and output

Check the first pair: Input = 5, Output = 45. Let's see if 5 * 9 = 45.
Second pair: Input = 2, Output = 18. 2 * 9 = 18.
Third pair: Input = 6, Output = 54. 6 * 9 = 54.
Fourth pair: Input = 9, Output = 81. 9 * 9 = 81.
So the rule is: Output = Input * 9.

Step2: Calculate the missing input

We know Output = 63. Using the rule Output = Input * 9, we can solve for Input:
Input = Output / 9 = 63 / 9 = 7.

Answer:

7