The next number in the sequence is 20. You are alternately multiplying the previous number by two and then subtracting two.
+6 -5 is the equation. 12 is the answer.
12,7,13,8 etc
42, each number in the sequence is the addition of the previous two: 2-2-4-6-10-16-26 2+2=4 4+6=10 6+10=16 10+16=26 16+26=42
The next number in this list would be 48. The reason this is the case is because the pattern is double to get the next number, then add 4 to get the next, then repeat. So 3 to 6 is a double, +4 gets you to 10. Double 10 to get 20, add 4 to get to 24. Double 24 to get 48, and then to continue you'd get 52, then 104, 108, 216 and so on
10
10
The next number is 34 Thus: 3 1 4 2 6 4 10 8 18 16 34 (Note: 3 + 1 = 4 : 4 + 2 = 6 : and so on)
21: (3)+3=(6)+4=(10)+5=(15)+6=(21)
The next number is 10. The pattern is -7, -6, -5, -4.
10
20
11 comes next.
The next number in the sequence is 20. You are alternately multiplying the previous number by two and then subtracting two.
+6 -5 is the equation. 12 is the answer.
12
3