Find the missing number in the following diagram:

The correct answer is Option (1) → 31

All the outer numbers are perfect squares, and the centre number is the sum of their square roots.

• First figure: \(169=13^{2}\), \(49=7^{2}\), \(81=9^{2}\), and \(13+7+9=29\), the number in the centre

• Second figure: \(36=6^{2}\), \(121=11^{2}\), \(196=14^{2}\)

• Missing number \(=6+11+14=31\)