Question

ONLY FOR GENIUS.....
........solve it.........

Answer 1

see here
2*(2+1)=2*3=6
6*(6+1)=6*7=42

that means two consecutive numbers are multiplied
so 9*(9+1)=9*10=90
ans is 90

Answer 2

We can see in the above problem that,

2 × (2+1) = 2 × 3 = 6
6 × (6+1) = 6 × 7 = 42

So, by the above pattern, we can observe that two consecutive numbers are being multiplied, so continuing furthermore...

9 × (9+1) = 9 × 10 = 90.

So, the required answer is 90.