Please tell me I'm not insane.

Posted by death on Nov. 29, 2011, 12:03 p.m.

I take onsite courses at college, however I still end up with so much online work to do… i swear there are some problems that they programmed false answers for. like this one:

what do you's think?

there's also this one, which seemed like it didn't offer a valid answer so i randomly guessed:

the answer they say is correct still doesn't seem right to me.

Comments

colseed 12 years, 12 months ago

Their answers kinda make sense actually…

The first problem, you're adding 2 to x each time because it's three consecutive odd numbers. (although solving the equation doesn't seem to give an integer…lol)

And on the second problem, it's the wording I think - 5 acres yield 84 bushels, so 78 acres will yield a lot more bushels. So the selected answer would only give the right answer if the right side of the equation was flipped (x/78 instead of 78/x)

Zac1790 12 years, 12 months ago

I understand the first one but question 15 does seem weird. I thought it would be 84/6 = x/78…

In the first question both answers would've found an answer, but your answer would've made the second two integers even so they wouldn't be 'consecutive odd integers' anymore. Say x is 125, if you +1 then it's 126, not odd. But +2 and it's 127. Then 129. However… If you run the equation you get an even number with a fraction to begin with for x hah.

It seems like they arbitrarily picked random numbers for every part of the equations. Maybe it's an anti-cheating measure, or something to make re-tests just as difficult?

Edit: Aw dang colseed posted first

Toast 12 years, 12 months ago

Their answers kinda make sense because they are right.

pidgin maths:

84/5=bpa (beans per acre)

bpa*78=x

bpa=x/78

84/5=x/78

84/x=5/78

cool fact - i actually got this wrong the first time asdsgfsbdgsfsjdghs durp

Castypher 12 years, 12 months ago

Good job, [insert school name here]. Adding three odd integers does not make an even.

death 12 years, 12 months ago

for no. 7 i was taught by my professor that consecutive odd integers would be 1,3,5… thus they are odd integers so it just completely confused me when it said that the correct answer has even integers…

for no. 15 i kept getting:

84/5 = x/78

which solving it gives

x = 1310.4

this just seems logical to me but maybe my A's in math just means im a good boy and not actually smart at all.

Toast 12 years, 12 months ago

84/5=x/78 is right, times both sides by 5/x.

sirxemic 12 years, 12 months ago

You're insane. ;)

Because all the questions and correct answers make 100% sense! It's just that everything is formulated in a very tricky way.

death 12 years, 12 months ago

lol damn well i guess it doesn't matter. i took the final today and got a 97% i only got 1 question wrong. i'm really curious as to what the question was though =\

Rolf_Soldaat 12 years, 11 months ago

I'm guessing you got "bushels" and "acres" mixed up on q15, which is understandable.

now question 7…

given: X = odd

which makes the possible aswers:

odd + (odd+odd) + (odd+odd) = even

or

odd + (odd+even) + (odd+even) = even

both of them are impossible.

death 12 years, 11 months ago

1 + 1 + 1 + 1 + 1 = 5 (odd)

1 + 1 + 2 + 1 + 2 = 7 (odd)

so Soldaat i'm not sure what your getting at o_o