Find the missing number in the table given below.
| 7 | 4 | 45 |
| 6 | 5 | 31 |
| 9 | 2 | ? |
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 79
In a number table, find the rule from the complete rows and use it for the incomplete row. Here the third number is the square of the first minus the second:
Row 1: \(7^2-4=49-4=45\)
Row 2: \(6^2-5=36-5=31\)
Row 3: \(9^2-2=81-2=79\)
So the missing number is 79.