13
Starting with the number three, the pattern appears to be :-
Subtract 9 then add 2 x 9 which generates -6, 12
Subtract 8 then add 2 x 8 which generates 4, 20
So the next steps are, subtract 7 then add 2 x 7 to produce 13, 27.
14 18 20
16
Think it's 30...then 20
3, -6, 12, 4, 20, 13, 27, 21, 33 -9, +18, -8, +16, -7, +14, -6, +12
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.
10
42
The given pattern appears to alternate between two sequences: one sequence that doubles the previous number (3 to 6 to 12) and another that adds 1 to the previous number (4 to 20). Following this pattern, after 20, the next number in the doubling sequence would be 24, as it continues from 12. Thus, the next number in the pattern is 24.
16
14 18 20
To find the next number in the sequence 2, -6, 12, 4, 20, we can look for a pattern. The differences between consecutive numbers are -8, 18, -8, and 16, suggesting a pattern of alternating increases and decreases. Following this pattern, the next difference should be -8, so we subtract 8 from 20, giving us 12. Therefore, the next number in the sequence is 12.
24
The pattern goes -1 x5 so the next number is 19x5 which is 95
Think it's 30...then 20
The next figure would be 21, followed by 11 & 10.
3, -6, 12, 4, 20, 13, 27, 21, 33 -9, +18, -8, +16, -7, +14, -6, +12