Complete the number triad:
| 12 | 20 | 28 |
| 21 | 19 | ? |
| 31 | 21 | 11 |
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 17.
| Understanding | Application |
|---|---|
|
The logic used here is: The sum of elements in each column is decreasing by 4 in the next column. Column 1: 12 + 21 + 31 = 64 Column 2: 20 + 19 + 21 = 60 |
Similarly, Column 3: 28 + x + 11 = 56 x = 17 Hence, option 2 is the correct answer. |