Missing NumberThese brain teasers rely on your ability to recognize groups of common attributes. For each of these puzzles you'll need to figure out why the words or letters are grouped as they are. Sometimes you will be asked to pick the odd-one-out or to place a new word into the correct group.
One number is missing from this finite set: 2-10-18-54-86.
What number is missing?
HintMan of Steel
AnswerThe missing number is 36.
It is a list of the atomic numbers of the noble gases (from the periodic table):
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