1. CBQ - Parity of the expression

A sports teacher forms practice groups. The number of students selected each day is represented by \(5n + 7\). The teacher notices that on some days the group size is even, while on other days it is odd. Instead of checking different values of \(n\), one student studies the parity of the expression. 

 

Based on the above information, answer the following questions. 

 

(i) If \(n\) is even, the parity of \(5n + 7\) is 

 

 

(ii) If \(n\) is odd, the parity of \(5n + 7\) is 

 

 

(iii) Which of the following statement is correct?

 

 

(iv) Which expression always has the same parity as \(5n + 7\)?