Question

Select the Next Number in the Series: 298 209 129 58 -4

Answer 1

Answer:

-4,58,129,209,298

Step-by-step explanation:

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Answer 2

Answer: -57

Step-by-step explanation:

The difference between each number in the sequence decreases by 9 each time.

298 - 209 = 89

209 - 129 = 80

129 - 58 = 71

58 - -4 = 62

This means that the next number of the sequence has to have a difference of 62 - 9.

-4 - x = [62 - 9]

-4 - x = 53

-x = 57

x = -57