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? Choices:
A) -5
B) -1
C) 1
D) 5
E) 6
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>1</output>
1   ANSWER:1
<result>C</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?