13
3, -6, 12, 4, 20, ?
4, 8, 12, 16, 20 and so on.
6
4
There is a "Fibonacci" like series is that each digit is the sum of the preceding two numbers: 4 + 8 = 12 8 + 12 = 20 So the series continues: 12 + 20 = 32 20 + 32 = 52 32 + 52 = 84 52 + 84 = 136 and so on. ----------------------------------------------------------------------------- What number do you want to be next? Give me a number and I'll give you a polynomial so that putting in 1, 2, 3, 4 gives the values 4, 8, 12, 20 and putting in 5 gives the number you want.
The sequence changes by multiplying with different numbers: from 3 to -6 (* -2), -6 to 12 (* -2), 12 to 4 (* 0.33), and 4 to 20 (* 5). If we continue this pattern, 20 multiplied by 0.5 gives us 10. So, the next number is 10.
25 is the next number that appears in that sequence.
13 is one possibility.
i dont think so he got smashed in number3
3, -6, 12, 4, 20, 13, 27, 21, 33 -9, +18, -8, +16, -7, +14, -6, +12
14 18 20
20 alternate numbers and double difference 6 / 8 / 12 = +2 / +4 / so +8 next = 12 + 8 = 20 (3 / 4 / 6 / 10 = +1 / +2 / +4 / so same again = 10 + 8 = 18 3 6 4 8 6 12 10 20 18 36 34 68 66