Annie walks at a rate of two miles per forty minutes. How many minutes does it take her to walk one mile?

20 minutes

2 miles = 40 minutes

1 mile = 20 minutes

answer:  

step-by-step explanation:

odd numbers are only divisible by 1 and itself.

even numbers are divisible by more than 1 and itself.

for example 6 is even because it is divisible by more than 1 and its self. 1 x 6= 6 ; 2 x 3= 6

and 7 is odd because only 7 x 1 equals seveb