Next Natural Numbers?Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.
Which numbers come next in this series?
1 7 9 10 11 _ _
HintThe title might give you a clue.
The series is natural numbers with the letter 'n' in their names (one, seven, nine, ten, eleven, thirteen, fourteen - after this, the next number that doesn't have an 'n' is 'thirty'). Did you notice numerous N's in the title?
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