17. Susie can do a certain piece of work in 6 hours while Trisha can complete the same piece of work in 3 hours. How long will it take them to do a piece of work together at the same rates?
A.1/2 hour
C.2 hours
B. 1 hour
D.3 hours
18. The sum of two consecutive even numbers is 14. What are the numbers?
A.2 and 4
C. 6 and 8
B. 4 and 6
D.8 and 10
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