Ambiguity!!!!!

Test Preparation SAT Preparation
1

<p>Can someone please elucidate it for me??! </p>

<pre><code>a b c d
</code></pre>

<p>a 0 4 7 8
b 0 3 4
c 0 1
d 0</p>

<p>The table above shows the results of subtracting the numbers a, b, c, and d from each other. Each number in the body of the table gives the difference when the number at the far left of the table is subtracted from the number at the top of the table. For eg., d-a = 8.
If c = 20, what is the value of a+b+c+d ?</p>

<p>(A) 63
(B) 65
(C) 67
(D) 69
(E) 71</p>

2

<p>D-20=1, so D equals 21.
21-A=8, so A equals 13
21-B=4, so B equals 17
C equals 20</p>

<p>Add em up and get 71. Answer E?</p>

3

<p>^Yes. The answer is E. But I didn’t understand the question itself!!</p>

4

<p>It’s probably supposed to be set up like this.</p>

<p>xxa b c d
a 0 4 7 8
b xx0 3 4
c xxxx0 1
d xxxxxx0</p>