Hard Number Series Puzzle

Hard Number Series Puzzle Solution - 13 November

What number comes next in the series 5 15 5 18 5 24 14 20 ?

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Solution
5

write the numbers in ascending order in words as onE twO threE fouR and so on
Replace the last letter in each word with position of letter in the alphabet (E=5, O=15, E=5, R=18 and so on)

so next number is ninE (=>5 as answer)