The number which best completes the sequence below is:1 1 3 2 4 6 5 25 ?
4
25
Unless you specify the length of the sequence, it is infinite, and so no number completes it. Given no further information, I would say the next number is 18. However, check out the link to the OEIS which gives a number of alternatives.
How are we supposed to answer this without the numbers? 27: 2 (+7=) 9 (-4=) 5 (+8=) 13 (-3=) 10 (+9=) 19 (-2=) 17 (+10=) 27 (-1=) 26
18
13 20 12
18 (3+1 4+2 6+3 9+4 13+5)
18
18
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:1 1 3 2 4 6 5 25 ?
4
9
It is 24+7 = 31
(plus) + 4 (minus) - 3
Continuing the sequence would be the the numbers 24, 31, 39.