ANSWERS: 5
  • 63,127..... :)
  • You're multiplying by 2, then adding 1. With that information, I'm sure you will be able to find the next two numbers.
  • 63 then 127, I just finished doin that in school.
  • There's the boring answer of 63, 127 Some have said multiply by 2 and add one. Which I think an odd way of looking at it, because each number is one less than a power of two. 2 4 8 16 32 64 128 each subtract one. No wait, isn't each number a power of two higher than the previous one. Or is it that you write the numbers in binary and then add an extra one to the end. Or is it an extra one to the start? But what about another answer? (12 - 18x + 23x^2 - 6x^3 + x^4)/12 To get the third number in the sequence for instance: (12 - 18*3 + 23*9 - 6*27 + 81)/12 = 7 So the next numbers are *obviously* 61 and 113.
  • the difference between two consecutive numbers are successive powers of 2: 2; 4; 8; 16; [32; 64] So you get: 1; 3; 7; 15; 31; 63; 127

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