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Home > Numbers
Problems dealing with numbers, digits, and such other purely abstract rubbish.
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List all prime numbers below 3000 that can be expressed
as a^2 + n*b^2 for all integer n's from 1 to 10.
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 Odd-abundant numbers. | Posted on 2018-07-21 by Ady TZIDON (No Solution Yet, 2 Comments)Truncatable primes | Posted on 2018-07-15 by Ady TZIDON (No Solution Yet, 2 Comments) From eleven to ... ETERNITY | Posted on 2018-07-14 by Ady TZIDON (Solution Posted, 3 Comments) Counting sudokus | Posted on 2018-07-13 by Ady TZIDON (No Solution Yet, 6 Comments) Aloof prime | Posted on 2018-07-12 by Ady TZIDON (Solution Posted, 2 Comments) Sum of 4 squares | Posted on 2018-07-08 by Ady TZIDON (Solution Posted, 4 Comments) 5 ways of factorizing | Rating: 3.00 Posted on 2018-07-07 by Ady TZIDON (Solution Posted, 3 Comments) Magic square of cubes | Posted on 2018-07-05 by Ady TZIDON (No Solution Yet, 0 Comments) Some prime sequences | Posted on 2018-07-04 by Ady TZIDON (No Solution Yet, 11 Comments)  Who's on the second base? | Posted on 2018-07-01 by Ady TZIDON (No Solution Yet, 1 Comments)Cubes as factorials' sum | Posted on 2018-06-23 by Ady TZIDON (Solution Posted, 1 Comments) 3 cubes | Posted on 2018-06-21 by Ady TZIDON (No Solution Yet, 2 Comments) Square Divisiblity | Rating: 3.00 Posted on 2018-06-17 by Daniel (No Solution Yet, 4 Comments) Zero is the last digit of S | Rating: 5.00 Posted on 2018-06-16 by Ady TZIDON (No Solution Yet, 3 Comments) Cubes of couples | Posted on 2018-06-12 by Ady TZIDON (No Solution Yet, 2 Comments) |
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