Question

Identify a pattern and find the next number in the pattern.

-5, 1, 7, 13

Answer 1

19

Explanation:

The pattern is that it +6 every number.

-5 + 6 = 1

1 + 6 = 7

7 + 6 = 13

So the next number is 13 + 6 = 19.

EDIT - I can't add sorry.

Answer 2

Explanation:

This is an arithmetic sequence.

-5, 1 , 7 , 13 ,.....

First term = a = -5

Common difference = d = second term - first term

= 1 - [-5] = 1 + 5

= 6

Next term = previous term + d

= 13 + 6 = 19

nth term = a +(n-1)*d

= -5 + (n-1)*6

= -5 + 6n - 6 {add like terms}

= -5 - 6 + 6n

= -11 + 6n

Pattern: 6n -11