Fidget Spinners are sold in packages of four or seven only at the corner shop. If Borris bought 98 Fidget Spinners exactly, what could be the number of larger packs Borris bought?
Choose the correct option.
A) 5
B) 9
C) 8
D) 7
E) 10
Let number of packs of four = f   let number of packs of seven = s   4f + 7s = 98   Now , we need to test for values of s .   Since sum 98 is even and 4f will always be even, 7s must also be even.   Now , we can test for values = 8 and 10   7*10 + 4*7 = 70 + 28= 
<gadget id="calculator">70 + 28</gadget>
<output>98</output>
98   Answer 10
<result>E</result>
Fidget Spinners are sold in packages of four or seven only at the corner shop. If Borris bought 98 Fidget Spinners exactly, what could be the number of larger packs Borris bought?