Find the missing number from the below options.
19 | 78 | 20 |
25 | 144 | 47 |
16 | ? | 13 |
Observe that the middle entry equals \(2 \times (\text{left} + \text{right})\):
Row 1: \(2 \times (19 + 20) = 2 \times 39 = 78\) → matches.
Row 2: \(2 \times (25 + 47) = 2 \times 72 = 144\) → matches.
Therefore, Row 3: middle \(= 2 \times (16 + 13) = 2 \times 29 = 58\).
\(\boxed{58}\)
Find the missing code:
L1#1O2~2, J2#2Q3~3, _______, F4#4U5~5, D5#5W6~6