Question

2+1=9
3+1=18
4+1=27
90+1=
​

Answer 1

The answer of 90 + 1=36

Answer 2

✏️The answer ✏️

2 + 1 = 9

3 + 1 = 18

4 + 1 = 27

90 + 1 = 801

Reason :- in the addition the first digit like 2 + 1 so 2 - 1 * 9 = 9

Same in 3 + 1

3 - 1 * 9 = 27

AND hence the answer is 801.

HOPE IT HELPS.......✌️✌️