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16. Instead of ellipses insert a word which forms new words together with other words. What letter does this word contain?
  IQ test. Fast and free online iq test # 1 with answers and solutions. Question # 16. Replace the dots with a word to make six new words.

The word "DAM" contains the letter D. (DAMPED, DAMSON, DAMASK, DAMAGE, DAMPEN, DAMMED).