Words Puzzles

3. What should go into the empty square?
In the bottom row numbers are substituted for letters (or letters for numbers) compared with the top row. T (the 20th letter) corresponds with 20 in the top row. (The middle row has no bearing on this comparison and is merely a ‘red herring‚.)
4. What do these dates have in common?
  15 February 1984
2 July 1983
16 December 1983
They all fall in the middle 15 February was the middle of February (1984 being a leap year); 2 Julywas the middle day of the year 1983; and 16 Decemberwas the middle of December.
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