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38. Instead of ellipses insert a word which forms new words together with other words. What letter does this word contain?
  IQ test. Free iq test online # 2 with answers and solutions. Question # 38. Replace the dots with a word to make seven new words.
 

Explanation:
The word "OUT" contains the letter O. (OUTCLASS, OUTGOING, OUTDOOR, OUTCOME, OUTFOX, OUTLAY, OUTDISTANCE).