Question

Plz answer correctly

Answer 1

`7`

Explanation:

This means that there are 20 terms in between 11 and 31

`31-11=20`

Since we know that the
`11th` term is
`29` and the
`31st` term is
`169`, you can subtract the two to find out the values in between

`169-29=140`

Now all we have to do is divide the values in between by the number of terms to find the common difference.

`(140)/(20) =7`

Therefore the common difference is
`7`