If you look at the raw answers, a lot of people who guessed the wrong answer according to: "What answer did you give?" said they got it right:

Right? What answer did you give?

Yes, double the previous number

Yes, Each number much larger than the previous

Yes, sequence must always increase by 1

Yes, Powers of 2

Yes, h = 2n, i = 2(n+1), j = 2(n+2) . n is an integer

Yes, Powers of 2