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Cool sequence 2 (Posted on 2003-05-07) Difficulty: 2 of 5
Here is a cool sequence.

1,10,101,1020,10301,______,_______...

What numbers go in the two blanks?

  Submitted by Tim Axoy    
Rating: 4.3077 (13 votes)
Solution: (Hide)
The first blank should be 104030.
The second blank should be 1050601.
Call the last number B and the second-to-last number A.
The formula for the next number is A+10B.
For example,101+10(1020)=10301.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionAnswerMath Man2023-05-25 20:43:20
SolutionPuzzle Solution With ExplanationK Sengupta2008-03-28 12:15:48
AnswerK Sengupta2008-03-28 12:14:49
SolutionGot itTim Axoy2003-05-11 06:45:01
SolutionA Ha!Lewis2003-05-11 00:06:23
How about...Brandon2003-05-10 18:47:57
I think...Silly Jilly2003-05-10 05:38:39
QuestionDunnoSilly Jilly2003-05-10 05:31:13
re: I had a cool theoryBrian Smith2003-05-08 10:02:17
Some ThoughtsI had a cool theoryCara2003-05-08 09:58:53
SolutionSolutionRavi Raja2003-05-07 19:52:13
better solution!Mark2003-05-07 18:12:02
Questionnot sureMark2003-05-07 17:45:02
Think I got itChaz2003-05-07 11:31:29
SolutionSolution?Chris2003-05-07 08:53:31
Off the top of my head....Brian Smith2003-05-07 08:39:12
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