12 replies to this topic

[curr3nt]

Spoiler for Lucky 7's

Figuring the 5878* and 12547* was fairly easy. I did trial and error to get the last two *.

. . . . . . . . . . . . 5 8 7 8 1
. . . . . . .--------------------
1 2 5 4 7 3 / 7 3 7 5 4 2 8 4 1 3
. . . . . . . 6 2 7 3 6 5
. . . . . . . -------------
. . . . . . . 1 1 0 1 7 7 8
. . . . . . . 1 0 0 3 7 8 4
. . . . . . . -------------
. . . . . . . . . 9 7 9 9 4 4
. . . . . . . . . 8 7 8 3 1 1
. . . . . . . . . -------------
. . . . . . . . . 1 0 1 6 3 3 1
. . . . . . . . . 1 0 0 3 7 8 4
. . . . . . . . . ---------------
. . . . . . . . . . . 1 2 5 4 7 3
. . . . . . . . . . . 1 2 5 4 7 3

[Rob_Gandy]

Spoiler for Lucky 7's

Figuring the 5878* and 12547* was fairly easy. I did trial and error to get the last two *.

. . . . . . . . . . . . 5 8 7 8 1
. . . . . . .--------------------
1 2 5 4 7 3 / 7 3 7 5 4 2 8 4 1 3
. . . . . . . 6 2 7 3 6 5
. . . . . . . -------------
. . . . . . . 1 1 0 1 7 7 8
. . . . . . . 1 0 0 3 7 8 4
. . . . . . . -------------
. . . . . . . . . 9 7 9 9 4 4
. . . . . . . . . 8 7 8 3 1 1
. . . . . . . . . -------------
. . . . . . . . . 1 0 1 6 3 3 1
. . . . . . . . . 1 0 0 3 7 8 4
. . . . . . . . . ---------------
. . . . . . . . . . . 1 2 5 4 7 3
. . . . . . . . . . . 1 2 5 4 7 3

How......? I had no clue where to even start on this one. What was your process for finding the numbers?

[curr3nt]

Spoiler for and I just deleted the excel file I was doing my work in...

Let's see...using VWXY7Z and AB7CE and numbering the steps 1 through 5. (A * VWXY7Z = step 1)

1. V has to be 1 and B and C have to be 8 or 9. That is the only way VWXY7Z * 7 = 6 digits and VWXY7Z * B (or C) = 7 digits.
2. Step 3 has to start with 9 and 8 or 8 and 7 which lead me to find VWXY7Z = 124Y7Z or 125Y7Z for small sets of Y. I ended up finding 12547Z fit using step 4's second number as a template.
3. C = 8 was then the only only that would work for step 4
4. Looked at B = 8 or 9 for step 2 can't remember what eliminated B = 9
5. Once I knew what the third digit of the first number in step 2 was I figured out what the third digit of the second number in step 1 would need to be. Only A = 3 or 5 would give me the number I wanted.
6. Looking at 125470 * 38780 and 125479 * 38789 eliminated A= 3

Then it was trial and error for Z and D