Using the mapping 0 rightarrow 0.1 rightarrow 1, 2 rightarrow 2.... 9 rightarrow
ID: 3406354 • Letter: U
Question
Using the mapping 0 rightarrow 0.1 rightarrow 1, 2 rightarrow 2.... 9 rightarrow 9, 10 rightarrow A, 15 rightarrow B, 20 rightarrow C, 25 rightarrow D, .... 135 rightarrow Z, 27 rightarrow and the matrix A below, a message has been encoded for students taking this exam. A = |1 0 -1 1 0 2 3 1 5 1 1 0 -1 1 10 2 3 1 1 1 1 0 -2 1 3| The encoded message (to be placed in a vector format) is How would you decode the message? Be as complete as possible. Give all the entries of the matrix representing the decoded message. What is the actual message?Explanation / Answer
A=[1 2 1 2 1;0 3 0 3 0;-1 1 -1 1 -2;1 5 1 1 1 ;0 1 10 1 3]
B=[289 216 -83 397 402; 550 390 -255 820 1615;377 396 13 665 950; 361 381 -7 342 708; 350 330 -50 280 850]
M= linsolve(A,B.')%% BT=AM,B is encoded message%%
ans =
105 75 27 30 35
45 100 105 27 10
30 120 80 50 65
27 30 27 100 100
10 95 6 27 30
which is equivalent to THE_ANSWER_TO_6E_IS_FALSE
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