Search: id:A039690
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%I A039690
%S A039690 1,2,5,10,20,25,50,100,125,200,250,500,1000,1250,2000,2500,5000,10000,
%T A039690 12500,20000,25000,50000,100000,125000,200000,250000,500000,1000000,
%U A039690 1250000,2000000,2500000,5000000,10000000,12500000,20000000,25000000
%N A039690 Ambitious numbers: numbers n with the property that if a number ends 
               in n then it is divisible by n.
%C A039690 Number whose 10's complement is a multiple of it. 125 is a member as 
               its 10's complement is 1000-125 = 875= 125*7 - Amarnath Murthy (amarnath_murthy(AT)yahoo.com), 
               Mar 08 2002
%D A039690 P. J. Davis and R. Hersh, The Mathematical Experience, Birkhaeuser, Boston 
               and Basel, 1981; see pp. 293-298.
%H A039690 Problem of the week, <a href="http://mathforum.org/wagon">Web site</a> 
               - problem 881
%F A039690 Consists of the numbers 1, 2, 5, 25 or 125 times a power of 10.
%e A039690 If a number ends in 2 then it is even and so is divisible by 2, so 2 
               is in the sequence.
%Y A039690 Cf. A039690.
%Y A039690 Sequence in context: A016029 A018327 A000099 this_sequence A126105 A117486 
               A000710
%Y A039690 Adjacent sequences: A039687 A039688 A039689 this_sequence A039691 A039692 
               A039693
%K A039690 nonn
%O A039690 1,2
%A A039690 Erich Friedman (erich.friedman(AT)stetson.edu)
%E A039690 Entry revised by N. J. A. Sloane (njas(AT)research.att.com), Aug 03 2004

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