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View Math Puzzle   (Math099)
The Five Cards
I have five cards bearing the figures 1, 3, 5, 7, and 9. How can I arrange them in a row so that the number formed by the first pair multiplied by the number formed by the last pair, with the central number subtracted, will produce a number composed of repetitions of one figure?

Thus, in the example I have shown, 31 multiplied by 79 and 5 subtracted will produce 2444, which would have been all right if that 2 had happened to be another 4.

Of course, there must be two solutions, for the pairs are clearly interchangeable.
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001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 
026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 
051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 
076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 
Hint: Subtract an odd number from an odd number will result in an even number.
Difficulty level = 2