Question

The first term of an arithmetic sequence is 4 and the tenth term is 67. What is the common difference?
9
6
7
8

Answer 1

Given:-

$a = 4$

$a_{10}=67$

and,

$a_{10}=a+(n-1) \times d$

$67 = 4+ 9 \times d$

$63 = 9d$

$d = 7$

so the common difference is 7