Here are some letter sequences, following a very similar rule. The ordering of the sequences may help you solve the sequences. Good luck!


Y E S _ _ L _ B J _


U D T C C S _ _ _ D


E _ T C _ C S _ N D

P.S.: All errors are intended. Please comment before you edit. Thanks!

P.P.S.: This is my first sequence problem. All constructive feedbacks are welcome.



These must be

Initial letters of names of numbers 1-10 in various languages

  1. Y E S _ _ L _ B J _

Yī, Èr, Sān, Sì, Wǔ, Liù, Qī, Bā, Jiǔ, S

  1. U D T C C S _ _ _ D

uno, dos, tres, cuatro, cinco, seis, siete, ocho, nueve, diez

  1. E _ T C _ C S _ N D

ek, do, teen, char, panch, cheh, saat, aath, nao, das

And the irregular numbering, judging particularly from the missing three, most likely refers to

the language's rank on the list of "most native speakers"; number three on that list is English, which would have been a dead giveaway.

  • 1
    $\begingroup$ yep, you've got it. good job! +1+tick! $\endgroup$ – Omega Krypton Feb 17 '19 at 9:58
  • $\begingroup$ Nice find! ${}$ $\endgroup$ – Mr Pie Apr 14 '19 at 13:38

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