Pattern: +7,-4,+8,-3,+9,-2...
Pattern continuation: +10,-1,+11,*0,+12,+1
17+10=27
that best completes the sequence 2 9 5 13 10 19 17 is 27.
The number which best completes the sequence below is:2 9 5 13 10 19 17?
What number best completes the sequence 1 1/2 5 10 1/2 18
27
29,28
27
27. But that continues the sequence, it does not complete it.
27
18
+ 7 - 4 + 8 - 3 + 9 - 2 ... +10 so 17 + 10 = 27
26
The sequence appears to alternate between adding and subtracting numbers. The pattern seems to be +11, -7, +5, -2, +6. Following this pattern, the next number in the sequence would be +3 from the previous number, which would be 21.