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These problems deal with sequences of numbers. Can you spot what the sequences' rules are?
Difficulty: 4 of 5 Latest: Just 3 digits
A 10-digit number 2404563210 has an interesting feature: reading from left to right - any k-digit string is divisible by k.
No big deal ! IMHO there are 2492 numbers like that.

At least one of them utilizes only 3 distinct digits.

Find this number.

(No Solution Yet, 4 Comments) Submitted on 2018-05-17 by Ady TZIDON   
Page 3 of 25   << prev next >>    
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Difficulty: 3 of 5All rational numbers in |
Posted on 2016-08-26 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 3 of 5Summing up |
Posted on 2016-08-17 by Ady TZIDON (Solution Posted, 2 Comments)
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Difficulty: 3 of 5Seventh Term Settlement |
Posted on 2016-07-22 by K Sengupta (No Solution Yet, 10 Comments)
Difficulty: 2 of 5Fibonacci yields Pythagoras |
Posted on 2016-07-05 by Jer (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Arithmetic Product Puzzle 2 |
Posted on 2016-06-14 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Term Finding with Floor |
Posted on 2016-06-09 by K Sengupta (No Solution Yet, 3 Comments)
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