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These problems deal with sequences of numbers. Can you spot what the sequences' rules are?
Difficulty: 2 of 5 Latest: Seven Rating: 5.00
1, 7, 8, 49, 50…
The above sequence consists of positive integers each being a sum of distinct non-negative integer powers of 7 presented in strictly increasing order.

If a(0)=1 and a(1)=7, what is a(111)?

(No Solution Yet, 2 Comments) Submitted on 2021-08-15 by Ady TZIDON   
Page 1 of 27   next >>    
Difficulty: 1 of 5Good sequence | Rating: 3.50
Posted on 2021-07-26 by Math Man (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Eleven as mandatory divider |
Posted on 2021-05-24 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5As time goes by | Rating: 2.33
Posted on 2021-02-09 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 2 of 5Just an Average sequence |
Posted on 2020-09-29 by Larry (No Solution Yet, 0 Comments)
Difficulty: 3 of 5What follows? |
Posted on 2020-09-26 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Must be prime |
Posted on 2020-09-22 by Ady TZIDON (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Check this sequence |
Posted on 2020-08-24 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 4 of 5Accelerating Sequence |
Posted on 2020-07-24 by Larry (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Fibo's common divider | Rating: 3.00
Posted on 2020-06-10 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Deja vu | Rating: 5.00
Posted on 2020-05-25 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 2 of 53-Digit Sequence in a Grid | Rating: 5.00
Posted on 2020-04-06 by Larry (No Solution Yet, 3 Comments)
Difficulty: 2 of 5PYHIYP #5 Seven up! | Rating: 2.00
Posted on 2020-02-26 by Ady TZIDON (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Got a hint? | Rating: 2.50
Posted on 2020-02-17 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 4 of 5Tricky sequence | Rating: 5.00
Posted on 2019-11-04 by Math Man (No Solution Yet, 2 Comments)
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