What number completes the sequence 1 5 14 30 55?

Answer 1

Each time the difference between the numbers goes up by +1 then down by - 1 alternatively Like so: 2(+7) 9 (-4) 5 (+8) 13 (-3) 10 (+9) 19 (-2) 17 so the next difference would be + 10 = 27

Answer 2

27, 26, 37

You alternate between adding and subtracting

when adding start by adding 7 and increase by 1 each step

when subtracting start with 4 and decrease by one each step

Answer 3

The answer is 485.

It is a sequence of numbers where the next number is calculated by multiplying hte current number by 3 and then adding 2.

(n+1) = 3(n)+2

Answer 4

18 because 3 - 4 - 6 - 9 - 13 - x

+1 +2 +3 +4 +5

13+5= 18 is the answer

Answer 5

91. The series is 1^2 = 1; 1^2 + 2^2 = 5; 1^2 + 2^2 + 3^2 = 14; 1^2 + 2^2 + 3^2 + 4^2 = 30; 1^2 + 2^2 + 3^2 + 4^2 + 5^2 = 55; 1^2 + 2^2 + 3^2 + 4^2 + 5^2 + 6^2 = 91

Answer 6

27