Let's see what de can be, and what af could then be. Remember that a>=5, since b>=1
14: 72 b=3 c=1 no
15: 53 no, odd
16: 82 b=3 c=1 no
18: 92 b=5 c=1 no, or 63 b=2 c=1 no
21: 73 no, odd
24: 83 no, odd
27: 93 no, odd
28: 74 b=3 c=3 no
32: 84 b=4 no
36: 94 b=5 c=3 no
42: 67 no, odd; 76 b=3 c=5 YES
54: 69 no, odd; or 96 b=5 no
56: 78 b=3 c=7 no, or 87 b=4 c=6 no
63: 79 or 97 no, both odd
72: 89 no, odd; 98 b=5,c=7 no
So, we are left with 735426
Answer this Question
math - The number uses every number 0-9 the numbers are used only once the ...
math - this code has five digit 1,2,3,4,5. the first digit plus the second digit...
math - *The number has 8 digits, none of the digits are the same. *It is evenly ...
Math - i am a four digit number. all of my digits are different. my first digit ...
math - The number has 8 digits none of the digits are the same 2. It is enemy ...
math - Find the four-digit number described by these three clues. 1) The first ...
math - i have a six digit question my 100 thousands is one less than my ones ...
Math - Solve the mathematical puzzle. Determine the digits of R from these clues...
math - What mystery number has 8 digits; none of the digits are the same. It is ...
Math - A number has 4 digits. The sum of the first and last digit is twice the ...