Select the missing number from the below options.
| 28 | 18 | 50 |
| 17 | 13 | 11 |
| 31 | 22 | ? |
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 36
The rule works down each column: half of the top number added to the middle number gives the bottom number.
First column: \(\frac{28}{2}+17=14+17=31\)
Second column: \(\frac{18}{2}+13=9+13=22\)
Third column: \(\frac{50}{2}+11=25+11=\) 36
Tip: When no rule fits along the rows, try the columns: here the rows give nothing, but every column follows the same rule.