Question

2+3+4=11 , 3+4+5=15 , 4+5+6=18 , 7+8+9=?​

Answer 1

Answer:

I guess the answer is 20

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Answer 2

Answer:

20 answer may be because the gaps in number decrease between 11to15 is 4 so in the sequence 18 to 20 only19 is there