The numbers of pizza slices that are sold in Joey's Pizza are only in quantities of 4 and 6 slices per customer. How many slices cannot be bought?	Choose the most appropriate option
A) 42.
B) 38.
C) 54.
D) 33.
E) 18.
Answer:	Let X pizzas of 4 slices and Y pizzas of 6 slices.   4X + 6Y.   Lets check options wise.   A. 42 =&gt; 4(3) + 6(5)   B. 38 =&gt; 4(5) + 6(3)   C. 33 = 3(4) + 6(7)   D. 54 =&gt; we can't write anything with 4 and 6 series..Lets try 4(5) + 6(2) = 32 , 4(4) + 6(3) = 34 , nothing works out.   E. 18 =&gt; 4(3) + 6(1)   Answer: correct option is 33.
<result>D</result>
The numbers of pizza slices that are sold in Joey's Pizza are only in quantities of 4 and 6 slices per customer. How many slices cannot be bought?