Find the missing number from the following given options:

Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 343
In each figure the left number is the square and the right number the cube of the number at the top.
First figure: \(6^{2}=36\) and \(6^{3}=216\)
Second figure: \(5^{2}=25\) and \(5^{3}=125\)
Third figure: \(7^{2}=49\), so the missing number is \(7^{3}=343\)