Study the given pattern carefully and select the number that can replace the question mark (?) in it.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 15
In each triangle, the number at the top is made from the two numbers at the bottom corners: (left number + 1) × right number.
First triangle: \((13+1)\times6=14\times6=84\)
Second triangle: \((17+1)\times9=18\times9=162\)
Third triangle: \((15+1)\times ?=240\), so \(\displaystyle ?=\frac{240}{16}=15\)