o.O really?
I wouldn't survive
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Yes, no caculators, only pen, pencil, ruler. I always bring my compass and set square just in case, but hush! ;)
Nah, since there are still problems that I can't solve :o
Ok, for example this one:
I didn't solve it and had to view the solution... :(Quote:
A, B, C are digits. The 3-digit number ACB is divisible by 3, BAC is divisible
By 4, BCA is divisible by 5, and CBA has an odd number of factors. Find ABC.
[3 marks]
Erm,is the answer,3bA divided by 4CA... erm monkeys.
I'm crap at this unky.
I hang my head in shame,the nuns will be turning in their graves.
(I was taught by nuns)
Is that English? ;)Quote:
A, B, C are digits. The 3-digit number ACB is divisible by 3, BAC is divisible
By 4, BCA is divisible by 5, and CBA has an odd number of factors. Find ABC.
[3 marks]
ABC... DEFG... HIJK... LMNOP... QRS... TUV... WX.. YZ.
That's my answer. :)
The poor nuns,they had their hands full with us.
Country girls can get up too a lot of mischief in a mixed school.
Umm dividing by 5 looks like the clue since only a multiple of 5 or 10 will work, so if BCA divides by 5 then it must end with a 5 or a 0. So A must be a 5 or a 0.
Am I on the right track?
Hey Bell, I'm bragging today, did you see my engagement ring?
The ring is divine Emop.
I learned a lot in school,and it had nothing to do with maths.
Lots to do with strategy,for example,how to get dan o brian's attention away from the hound that was fiona tynan (names changes to protect the said hounds)
And,how high can I get away with rolling up my shirt before the nuns lose the plot.
And the classic, how do I get a sneaky smoke in before P.E,and how do I get to the disco on Friday!
Yes it is gorgeous Emop, very pretty.
Have you started looking at dresses? Why are you guys getting married so soon?
Drat Unky you got me hooked now but I'm stuck after the first bit.
Sorry, telephone rang again...
Yes, QP, A = 5 :)
Thanks
Yes and I have it picked out,
It's in the summer so it isn't that soon. We've been together for 6 months if you don't count the few weeks we've broken up. It just feels right. And things in my family are pretty different from most families. My extended family is surprised I haven't been married off YET
Well, let's see the dress!
Next step, using the statement
A, B, C are digits. The 3-digit number ACB is divisible by 3, BAC is divisible
by 4, BCA is divisible by 5, and CBA has an odd number of factors. Find ABC.
[3 marks]
We know that A = 5, hence, there is 5C
where C is either 2 or 6.
Using the next statement 'The 3-digit number ACB is divisible by 3'
We know that A + B + C is divisible by 3. So,
if C = 2, B = 2, 5 or 8.
if C = 6, B = 1, 4 or 7.
Then, using 'CBA has an odd number of factors'
We have either of:
225, 255, 285, 615, 645, 675
From those, we try each of them until we get an odd number of factors.
Very pretty dress Emop.
Thanks guys
And Please Unky! No more brain ouches
I said I'll stop :(
Aww it's okay Unky, we're just jealous because we aren't as smart as you!
Ok, I'm tired now, see you all!
Night Unky!
Wearing white on your wedding day doesn't signify virginity, it just signifies your first marriage.
A veil signifies virginity.
Just saying.
OK, so B can be pretty much any digit. C must be an even number. A must be either 5 or 0.
since a 3-digit number cannot start with 0, none of the digits can be 0, which mean A must be 5.
5CB must be divisible by 3, while B5C must be divisible by 4. since C must be even, that leaves us with 2, 4, 6, or 8. B can be any digit but 0 at this point.
let's try A=5 B=1 C=6.
561/3=187
156/4=39
165/5=33
the only way for a number to have an odd number of factors is if it has a whole number as the square root. The square root of 516 is 22.71, so it's not our answer.
OK, so, let's try A=5 B=4 C=6
564/3=188
456/4=114
465/5=93
the square root of 546 is 23.36, so it's not our answer, either.
A=5 B=5 C=8
585/3=195
558/4=139.5 which eliminates that as a possibility
A=5 B=8 C=8
588/3=196
858/4=214.5 which eliminates that, too
OK, I'm at a loss.
I have rivers of sweat running of me, this flu is making me a right old minger. ><.
Hope you are able to get some rest QLP and feel better soon. Anything like Lemsip or tea helpful?
Hey Hheath, hope you are feeling better. But you know, heat stroke is just another excuse to strip nakkie and spray yourself down with water... juts sayin'...
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