Find the missing number from the following given options:

The correct answer is Option (4) → 36

In each triangle, the product of the three corner numbers divided by 10 gives the number inside. The rule is found on the two complete triangles and then applied to the middle one.

• First triangle: \(6\times7\times5=210\), and \(210\div10=21\)

• Third triangle: \(50\times10\times10=5000\), and \(5000\div10=500\)

• Middle triangle: \(15\times6\times4=360\), and \(360\div10=36\)