Question

What’s the next 3 numbers after 1, -3, 9, -27

Answer 1

81, - 243, 729

Explanation:

There is a common ratio between consecutive terms in the sequence, that is

r = - 3 ÷ 1 = 9 ÷ - 3 = - 27 ÷ 9 = - 3

Thus to obtain a term in the sequence multiply the previous term by - 3

- 27 × - 3 = 81

81 × - 3 = - 243

- 243 × - 3 = 729

Answer 2

1, -3, 9, -27, (81),-243,729,-2187

Explanation:

81 is the answer