Find the missing number from the following given options.

Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 1600
In each figure, the number at the bottom is the square of the product of the two numbers on the arms. The two complete figures show the rule, and it is then applied to the first one.
Second figure: \(9\times6=54\), and \(54^{2}=2916\)
Third figure: \(10\times7=70\), and \(70^{2}=4900\)
First figure: \(8\times5=40\), so the missing number is \(40^{2}=1600\)