In the given question, a matrix of certain numbers is given. These numbers follow a certain trend, row-wise or column-wise. Find out this trend and choose the missing number from the given alternatives.
| 20 | 6 | 15 |
| 5 | 8 | 4 |
| 20 | 3 | 5 |
| 120 | 51 | ? |
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 65
The trend runs down each column: the first number multiplied by the second, plus the third, gives the number in the last row.
Column 1: \(20\times5+20=120\)
Column 2: \(6\times8+3=51\)
Column 3: \(15\times4+5=60+5=\) 65