What is the common ratio of the sequence 3,21 147. __ square

To find the common ratio of a geometric sequence, we need to divide any term by the previous term. <br /><br />Let's take the second term (21) and divide it by the first term (3):<br /><br />$\frac{21}{3} = 7$<br /><br />Therefore, the common ratio of the sequence is 7.