Question

4. Let p, q and r be distinct integers, that are odd and positive. Which of the following must be true? 1) (p + q) (q + r) (r - p) is negative 2) (p + q) (q + r) (r + p) is even 3) (q - p) (q - r) (p - n) is positive 4) (p + q) (q + r) (r + p) is odd.​

Answer 1

Answer:

option - 2 is correct

Step-by-step explanation:

sum any two odd numbers is even

p+q is even

q+r is even

r+p is even

product even numbers is even

(p+q)(q+r)(r+p) is even