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             We seek order and pattern in all things
                  and often adjust our paradigm.

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                             Puzzle #421
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           What is the next number in this closed set?

       4, 8, 6, 3, 5, 10, 8, 4, 6, 12, 10, 5, ___, 14, 12

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                             Puzzle #422
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        What is the missing letter in this closed sequence?

                 Y, Y, H, L, E, ___, T, R, R, R, R

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                             Puzzle #423
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              What is the next number in this series?

               42, 82, 83, 23, 63, 04, 44, 84, ___

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                             Puzzle #424
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              What is the next number in this series?

               23, 45, 67, 89, 101, 234, 567, 890, ___

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                             Puzzle #425
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                      Complete this closed set.

                        I, U, X, C, ___, ___

Thanks to C. Reed Winstone of Manitoba Hydro.

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