It appears to be increasing in difference by 2. The nth number is n2 +2.
1*1+2=3
2*2+2=6
3*3+2=11
Chat with our AI personalities
-18 then -27
The answer depends on where, within the sequence, the missing number should have been.
The next number in this sequence should be 33.
18+x=27 calculate and your answer should be 9.
12, 8