In the following sequence: [x, y, z, 5, 7, 16, 28] each number is equal to the sum of the three numbers preceding it. What is x-y?	Choose the correct choice from the following:
A) 6 B) 3 C) 4 D) 5 E) 7
lets start from z, as per the question stem   z + 5 + 7 = 16   --&gt;&gt; z= 4   similarly, y + 4 + 5 = 7   --&gt; y = -2   similarly,, x + -2 + 4 = 5   --&gt; x = 3   hence , x-y = 3+2= 
<gadget id="calculator">3+2</gadget>
<output>5</output>
5   ANSWER:5
<result>D</result>
In the following sequence: [x, y, z, 5, 7, 16, 28] each number is equal to the sum of the three numbers preceding it. What is x-y?