Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 9 | 8 | 7 |
| 6 | 7 | 8 |
| 4 | 5 | 3 |
| 50 | ? | 53 |
Option 1: 51
Option 2: 61
Option 3: 47
Option 4: 52
Correct Answer: 51
Solution : Multiply row one with row two and subtract the resultant by row three, to get the required missing number in row four –
In column one : 9 × 6 – 4 = 54 – 4 = 50
In column three: 7 × 8 – 3 = 56 – 3 = 53
In column two: 8 × 7 – 5 = 56 – 5 = 51
So, the required missing number in the matrix is 51. Hence, the first option is correct.
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