Find the missing number that should come at the place of question mark (?).
The rule is applied column-wise. If the top number is \(n\):
Middle \(= n(n-1)\), and Bottom \(= n(n+1)\).
Check Column 1 (top \(17\)): \(17\times16=272\) (middle) and \(17\times18=306\) (bottom).
Check Column 3 (top \(19\)): \(19\times18=342\) and \(19\times20=380\).
So for Column 2 (top \(13\)): bottom \(=13\times14=182\).
\(\boxed{182}\)
A | B | C | D | Average |
---|---|---|---|---|
3 | 4 | 4 | ? | 4 |
3 | ? | 5 | ? | 4 |
? | 3 | 3 | ? | 4 |
? | ? | ? | ? | 4.25 |
4 | 4 | 4 | 4.25 |