The difference between consecutive numbers is 1, 2, 3, 4.
So the next difference will be...
Added to 13 gives...
The number which best completes the sequence below is:2 9 5 13 10 19 17?
18
29,28
18
26
The number which best completes the sequence below is:2 9 5 13 10 19 17?
that best completes the sequence 2 9 5 13 10 19 17 is 27.
18
What number best completes the sequence 1 1/2 5 10 1/2 18
27
27
29,28
27. But that continues the sequence, it does not complete it.
27
13 20 12
18
18