1. If the sum of two distinct natural numbers is 156 and their HCF is 12 , how many distinct pairs of such numbers are possible? \( \begin{array}{ll}\text { A. } 10 & \text { B. } 6 \\ \text { C. } 8 & \text { D. } 12\end{array} \)

b) \( 1 \div \frac{2}{9} \)

E 4 Litun : DIG DEEPER! You can complete one-half of a job in an hour. Your friend can complete one-third of the same job in an hour. How long will it take to complete the job if you work together? Write your answer as a decimal. The job will take hour(s).

14. \( 1 \frac{5}{9} \cdot\left(\frac{9}{14}+\frac{3}{4}\right) \)

Mrs. Andrew's classroom has 4 rows of desks with 3 desks in each row. She placed 2 pencils on each desk. How many pencils did Mrs. Andrew place on the desks altogether?

Test Practice 17. Becka made 2 cards. She drew 3 balloons on each card. Each balloon had 3 stars. How many stars did Beckg use on her cards altogether? \( \begin{array}{ll}\text { (A) } 15 \text { stars } & \text { (C) } 17 \text { stars } \\ \text { (B) } 16 \text { stars } & \text { (D) } 18 \text { stars }\end{array} \)