Question

Find the missing number from the below options. \[ \begin{array}{ccc} 19 & 78 & 20
25 & 144 & 47
16 & \;? & 13 \end{array} \]

• A. 96
• B. 76
• C. 58
• D. 29

Hint:

In number tables, first test if the center is a simple function of the outer numbers (sum, difference, or product) applied consistently by rows or columns.

Answer 1

The Correct Option is C

Observe that the middle entry equals \(\;2\times(\text{left}+\text{right})\):
Row 1: \(2\times(19+20)=2\times 39=78\) \Rightarrow matches.
Row 2: \(2\times(25+47)=2\times 72=144\) \Rightarrow matches.
Therefore, Row 3: middle \(=2\times(16+13)=2\times 29=58\).
\[ \boxed{58} \]