Asked by Thomas

A test has 12 problems, and each problem is worth 5 marks. Full marks are given for a correct answer, 2 marks are given if there is no answer, and no marks are given for an incorrect answer. Some scores between 1 and 60, are impossible to get on this test. What is the sum of these impossible scores?
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The numbers I have found myself are 1, 3, 53, 56, 58 and 59. Though I know I have the wrong answer when I add those up? What number or numbers am I missing?
Answered by Steve
If there are no correct answers, then the possible scores are
0,2,4,...,24

If 1, then
5,7,9,...,27

If 2, then
10,12,14,...,30

I think you can see the pattern here. Just make a 12x12 table and fill in the scores. Then cross them off a list of values from 1-60. Those remaining are impossible.
Answered by H.X
Okay. I think the test did not include having 1 or 60. I talked with my teacher, and 1 is not included in the answer, along with 60. The answer has to be between 1 and 60.
U GOT THAT?
Answered by PROJECT: K.Y.L.E
A test has 12 problems, and each problem is worth 5 marks. Full marks are given for a correct answer, 2 marks are given if there is no answer, and no marks are given for an incorrect answer. Some scores between 1 and 60, are impossible to get on this test. What is the sum of these impossible scores?
Answered by Mysterious
Just do what @steve said because that is the right answer
Answered by amongus
its 69
Answered by 228
When added the answers 228
Answered by hi
we all know where t his comes from
Answered by Spirit of Math :)
I think when you add the numbers up in your answer, (without the one because it doesn't count) you get the right answer. Sorry if my answer is a bit late :/
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