RATIONAL NUMBERS
Credit: NY Times Crossword
September 16, 2001
Bill Zais

In this very clever crossword twist, six of the answers were left unclued, except for an arrow pointing back at the number itself. The unclued numbers are shown below. Can you come up with the answers?

1 
11
20
33
52
53
66

Answers:

1. HALF AND HALF
11. ONE AND THE SAME
20. SECOND TO NONE
33. THREE ON A MATCH
52. SINGLE DECKER
53. PIECES OF EIGHT 
66. AN EVEN DOZEN