Below are 10 sequences. The first three members are written below, you have to name the 4th member. The twist: all 30 of the first three members have been mixed up!
very nice! I was confused at first because I thought hints were shuffled within the same column (so the first column would contain one hint for each of the sequences)
I couldn't figure out busiest airports and newest countries... but I also missed tallest buildings because I thought you had mistakenly already included the Burj Khalifa and had listed it under it's older name the Burj Dubai.
You've still got Willis Tower listed as "Sears"... so... but I guess this is what they were called when they held the title? The Burj Dubai had it's name changed before it was completed, if I'm not mistaken.
The only one I didn't get was Montana and that's currently the 3rd most guessed answer!!... I could have been here for 20 minutes before I thought of that state.