I need help 3, -6, 12, 4, 20, ? What is the next number in the sequence 3, -6, 12, 4, 20, ? What is the pattern here?

Question

The possible answers are:

13

14

6

16

Answer 1

Oh yeah, this one's DEEP DEEP DEEP... real Deep!!!

I'll pick 13....

Here's why... the number being subtracted (the subtracthend)

doubles and changes sign, then decreases by one...

OBSERVE THE NUMBERS IN BOLD ITALIC

3 - 9 = -6

-6 - -18 = 12

12 - 8 = 4

4 - -16 = 20

The next number in the pattern to be subtracted is then 7.

20 - 7 = 13 <--- there's the answer

Then

13 - (-14) = 27

THe pattern continues from there..

27 - 6 = 21

21 - -12 = 33

33 - 5 = 28

28 - -10 = 38

38 - 4 = 34

34 - -8 = 42

42 - 3 = 39

39 - -6 = 45

45 - 2 = 43

43 - -4 = 47

47 - 1 = 46

46 - -2 = 48

48 - 0 = 48

48 - 0 = 48

48 - -1 = 49

49 - 2 = 47

47 - -2 = 49

49 - 4 = 45

can you continue the pattern from here???