Puzzles/POY 2005

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Puzzle of the year 2005: find phrases that generate each number i.100 , making no use of

  • digits other than 2 0 0 5 in sequence
  •  _ and __ and _. as numbers
  • letters in numeric constants (e.g. 200r5 for 40 is prohibited)
  • literal strings

The number of words in each phrase is to be minimized. (Word count is according to #;:y ). Where there are multiple phrases for the same number with the same number of words, phrases with fewer essential characters are preferred.

<!> Note: This page is a community effort, and one objective is to have an "interesting" puzzle. If you discover loopholes in the current rules that make the puzzle completely uninteresting, a better contribution would be to tighten the rules, rather than to fill up the page with uninteresting entries exploiting the loopholes. For example, if _ and __ as numbers were permitted, then   # 2005 _   and   # 2005 _ _   etc. would pretty well solve the whole thing. Now what fun would that be?

Solutions:

 0  /: 2005
 1  * 2005
 2  2: 005
 3  >. 2.005
 4  # 2 0 0 5
 5  {: 200 5
 6  +: >. 2.005
 7  2 + 005
 8  A. 2 005
 9  #. 2 005
10  2 ! 005
11  #. 2 0 0 _5
12  <: #. 2 00 5
13  #. 2 00 5
14  <. %: 200.5
15  20 - 05
16  +: A. 2 005
17  +: #. 2 0 0.5
18  A. \: 2 0 0 5
19  #. /: 2 0 0 5
20  {. 20 05
21  >. 20.05
22  #. |. 2 00 5
23  p: A. 2 005    also #. p: 2 005
24  ! # 2 0 0 5
25  20 + 05
26  +: #. 2 00 5
27  ^~ # 20 0 5
28  #. \: 2 0 0 5
29  p: #. 2 005
30  #. |. 20 05
31  #. I. 2 005
32  2 ^ 005
33  #. *: 2 005
34  <: #. 20 _05
35  #. 20 _05
36  -. #. _20 05  also >: #. 20 _05
37  #. p: 2 00 5
38  #. >: 20 _05
39  <: 200 % 5
40  200 % 5
41  #. *: 2 00 5
42  +: #. 2 0 0 5
43  p: #. 2 00 5
44  <. %: 2005
45  #. 20 05
46  >: #. 20 05
47  p: <. %: 200.5
48  #. >: 20 05
49  *: 2 + 005
50  2 * *:005
51  >. ! %: 20.05
52  +: +: #. 2 00 5
53  p: 2 ! _005
54  <. ^ # 2 0 0 5
55  >. ^ # 2 0 0 5
56  <: #. *: 2 0 0 5
57  #. *: 2 0 0 5
58  /:&.#: 20.05
59  {: q: >: 2005
60  -/ p: 20 05
61  ?. <: {. 200 5
62  <. o. 20.05
63  >. o. 20.05
64  *: A. 2 005
65  #. p: 2 0 0 5
66  ?. #. 200 5
67  <.o./2 00 5
68  #. <: 20 0 _5
69  #. p: p: 2 005
70  +: #. 20 _05
71  -: #. ! 2 0 0 5
72  <: {. p: 20 05
73  {. p: 20 05
74  <: #. 20 0 _5
75  #. 20 0 _5
76  ?. #. 20 0 5
77  >: ?. #. 20 0 5
78  #. <: 20 0 5
79  p: >. 20.05
80  200 - ! 5
81  *: #. 2 005
82  #. >: 20 0 _5
83  |. &. #: 200.5
84  <: #. 20 0 5
85  #. 20 0 5
86  >: #. 20 0 5
87  #. <: +: 20 05
88  +/ p: 20 0 5
89  <. +: %: 2005
90  +: #. 20 05
91  -: A. 2 0 05
92  #. >: 20 0 5
93  #. I. 2 0 0 5
94  >: #. I. 2 0 0 5
95  #. ~ _20 _05
96  ?. +: #. 20 0 _5
97  p: ! # 2 0 0 5
98  +: *: 2 + 005
99  <: 20 * 05



See also