Select the number that will replace the question mark (?) in the table below.
| 6 | 2 | 3 |
| 20 | 4 | 5 |
| 42 | 6 | ? |
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 7
In a number table, find the rule from the complete rows and use it for the incomplete row. Here the first number is the product of the other two:
Row 1: \(2\times3=6\)
Row 2: \(4\times5=20\)
Row 3: \(6\times?=42\), so \(?=42\div6=7\)
So the missing number is 7. (In every row the third number is also one more than the second.)