Copy and complete each of the Diamond Problems below. The pattern used in the Diamond Problems is shown at right.

1. 

   Hint (a):

   Refer to problem MC1 2-108 for help if you are having trouble getting started.

   Step 1(a):

   To fill in the second $\#$ square, try to determine what plus $4$ is equal to $7$.

   Step 2(a):

   Next, fill in the product square by finding the product of $4$ and $3$.

   Answer (a):

   $3$ and $12$ complete this diamond.

   

   

2. 

   Hint (b):

   What two numbers multiply to make $15$ and add together to make $8$?

   Answer (b):

   

3. 

   Hint (c & d):

   For parts (c) and (d), follow the steps outlined in part (a). Depending on the problem, you can begin by either subtracting or dividing to find the second $\#$.