First times two, add two and then minus one. Repeat.
The next number in the sequence is 15 - the sequence goes x2, +2, -1
18
15
This is a 4 step sequence , starting with the number 1. 1) Double the number 2) Add 2 3) Subtract 1 4) Return to step 1) and repeat. 1 x 2 = 2 ; 2 + 2 = 4 ; 4 - 1 = 3 ; ..........7 x 2 = 14 ; 14 + 2 = 16. Then the next number is generated by Step 3).. 16 - 1 = 15
15
15
15.
x 2 + 2 - 1 is the repeating sequence 1 x 2 = 2 2 + 2 = 4 4 - 1 = 3 3 x 2 = 6 6 + 2 = 8 8 - 1 = 7 7 x 2 = 14 14 + 2 = 16 16 - 1 = 15 the next number is 15
15,30,32,31,62,64,63..... (*2,+2,-1)
a,b,c,d = 1,2,4,3 b=2a c=b+2 d=c-1 7*2=14 14+2=16 16-1=15
17 19 20
Type your answer here... 15