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3N3 (
Posted on 20180108
)
My 4digit number
N
becomes 43 times bigger if you squeeze it between two threes.
Find
N
, aided by pen & paper only.
No Solution Yet
Submitted by
Ady TZIDON
No Rating
Comments: (
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)
an expanded problem
 Comment 2 of 3 
Suppose N is a kdigit number.
There is no solution if k is odd since division by 11 is required.
If k is even N is 91 preceded by (k/2  1) blocks of 90.
For example, for k=10, N=9090909091.
Posted by
xdog
on 20180108 18:20:24
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