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 Aptitude  |  Question 16 of 26    Print  
There is a 14-digit credit card number in which every 3 consecutive digits add to 20.
Here is a part of it. Find the value of 'x'?
_ _ _ 9 _ _ _ x _ _ _ 7 _ _
4




  
Total Answers and Comments: 1 Last Update: October 25, 2005   
  
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October 25, 2005 14:49:05   #1  
Aaron C        

RE:
just consider the last 3 digits of the 14 digit no:... So as to make the sum 20 the combinations should be (7 9 4) (7 8 5) (7 7 6) and so on. so using trial and error method we can substitute (7 9 4) and complete the 14 digit sequence 94794794794794.THe answer being 4
 
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