13 is one possibility.
3, -6, 12, 4, 20, ?
20
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.
22
The next number in the sequence is 20. You are alternately multiplying the previous number by two and then subtracting two.
20/12 = 5/3 = 12/3
3, -6, 12, 4, 20, 13, 27, 21, 33 -9, +18, -8, +16, -7, +14, -6, +12
The next is 3.
To find the next number in the series 4, 8, 12, 20, we need to identify the pattern or rule governing the sequence. In this case, the pattern is that each number is the sum of the previous two numbers. 4 + 8 = 12, 8 + 12 = 20, and 12 + 20 = 32. Therefore, the next number in the series is 32.
1/2, 2/3. 3/4, 4/5, 5/6 1/2 of 60 = 30 2/3 of 30 = 20 3/4 of 20 = 15 4/5 of 15 = 12 5/6 of 12 = 10 The next number is 10
20/12 = 18/12 = 12/3
There is a mistake in the question -fourth number should not be 122² = 45² = 258² = 6411² = 121 (not 12)14² = 19617² = 289so add 3 to previous number then square it17 + 3 = 20then 20² = 400 next number