I'm trying to solve a number sequence question that goes like this:
15, 14, 30, ?
This question gave four options, 29, 28, 27, and 26.
I think that 29 and 28 are both correct but this only accepts one answer.
29 is correct since 15 -1 = 14, then 14 + (15+1) = 30, so its plus then minus, so 30-1=29 Using this sequence, we can tell that the next number after 29 would be 29+(30+1)=60.
28 is also correct since this looks like a multiplication puzzle, since the first number is 15 and the third number is 30, which is 15x2. So, the number represented by the question mark, which is the forth number, would be 14x2=28. The next number after 28 would be 30x2=60.
I have a feeling that 29 is a better answer than 28 as I found many more evidences that leads to the number 29. However, I also feel that 28 is also correct. However, as I've said, you can only choose one answer. So which is the best answer?