Go to the site version for smartphones.
15. Replace the dots with a word to make nine new words. What letter is in the word in parentheses?
  IQ test. Accurate and free online iq test # 4 with answers and solutions. Question # 15. Replace the dots with a word to make nine new words.
 

Explanation:
OUT contains U. (OUTBURST, OUTDO, OUTDOOR, OUTFOX, OUTBREAK, OUTCOME, OUTCLASS, OUTLAY, OUTGOING).