Question

Could someone please help me with this question?

Answer 1

(the center one)

Answer 2

Off Topic question: You get points if you leave something blank? LOL.

Answer 3

1, 3, 11, 13, 21, 23....

Answer 4

Continue that pattern up to 150.

Answer 5

@Sepeario

Answer 6

@Azteck , yea, it's a hard exam, so they do that, lol.
and i've been trying to think of a simple solution, but I cant, I think you might just have to go one at a time.
so you have
1 3 and then you have a big jump, because you can ad (2+2+2+5). On the other end of the spectrum, you can't have 154, or 152. but besides that, I think you're golden, So it would just be those 4 numbers

Answer 7

Yep. I forgot about that being 30 questions. Yeah you're on the ball.

Answer 8

Wait but you can't have 154 or 152 anyway....

Answer 9

yea, thats what the questoin was asking, how many numbers cant you have. Its 1 and 3 on the left side, and then 154 and 152 on the right, so there are a total of 4 numbers in total :)

Answer 10

The maximum score is 150.

Answer 11

152 and 154 is over 150.

Answer 12

oh crap, i mean 149 and 147, my bad >.<

Answer 13

>>11, 13, 21, 2311, 13, 21, 23

Why are these impossible scores?

Answer 14

can you have 1 point? Wher can you get 1 point?

Answer 15

you can't, the 4 solutions you cant get are 1, 3, 147, and 149.

Answer 16

do you halve points from blank answers or something. Don't think there's a rule for that. xD

Answer 17

@Azteck How do you get a score of 143 ?

Answer 18

You misread the question mate.

Answer 19

You must state the scores that are NOT possible!

Answer 20

huh. well, what do you konw, there are a couple more on the other end of the spectrum, pellet >.< you can't get 143.

Answer 21

and I said continue the pattern 1, 3, 11, 13 all the way up to 150.

Answer 22

lets see, 144, 145, 147 are good, 149, 148, 146, 143 are not.

Answer 23

And plus what Khushal said about the last two numbers.

Answer 24

however, 11 and 13 both work @Azteck

Answer 25

I think the answer is 6 total.
1, 3, 143, 146, 148, and 149

Answer 26

Dang, then it's just 1, 3 and the last three numbers you stated.

Answer 27

last 4** lol

Answer 28

Yeah, you're correct Khushal.

Answer 29

>>you can't, the 4 solutions you cant get are 1, 3, 147, and 149.
--------------------
Okay, I'm looking at the above as the four scores you cannot get.

I claim that is not correct and to offer evidence of that incorrectness, I claim that you cannot get a score of 143 on the test. I don't think I misread that but it is possible.

Answer 30

@Directrix, i corrected myself, no worries, thanks for catching my mistake :)

Answer 31

Ah yep. Apologies go to Directrix. My mistake.

Answer 32

>>> I think the answer is 6 total.
1, 3, 143, 146, 148, and 149
-----------------------
@Khushal_Shah I agree with those 6 unattainable scores.

Answer 33

@Azteck No worries. It is fun to discuss these problems.

Answer 34

Yeah, I went to fast thinking this question was pretty simple but it turned out the question was more than it seemed.

Answer 35

went too*

Answer 36

yea, I always hate questions like this. However, once you see that a combination of an odd number and an even number gives you most solutions, you realize it's only the numbers at either end that really matter :)

Answer 37

Problems worthy of attack prove their worth by hitting back. (Piet Hein)

Did everyone see this problem:
http://openstudy.com/users/sepeario#/updates/516ba960e4b02ec89c5abe99

Answer 38

Thanks @Directrix you've been really helpful to me lately!