BrainBashers - Random Puzzles

Puzzle 189

What letter comes next in this sequence:

X · L · C · D · ?

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Puzzle 190

Each of the following sets of letters can be made into a real word by adding three letters to the beginning, and the same three letters in the same order to the end.
ertainm iscove row ioxid rocos
For example:

   iperspir
   ??? + iperspir + ???
   ant + iperspir + ant
   antiperspirant

Puzzle Copyright © Elliott Line
This puzzle appeared in Mensa's EnigmaSig (203.08) and is used with permission.

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Puzzle 191

What number comes next in this sequence:

42 · 1412 · 11141112 · 31143112 · 132114132112 · ?

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Puzzle 192

At a recent BrainBashers party, I noted the ages of the children who attended.

Billie was 3, James and Keith were 4, Frankie and Rebecca were 5.

How old was Lara?

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