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Bodmas and fraction challenge

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Bodmas and fraction challenge

Post  Admin on Wed Jan 05, 2011 8:54 pm

Hi clever clogs! Here's the problem we started in class. you have to simplify. The answer will either be a,b,c or d.




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I think....

Post  Meejin on Sat Jan 08, 2011 7:00 am

I think I got it!
but I'm not really sure....

5/30-1/7*[(4-18/27)÷8/3+(3/8 )²*(7/4*7/9+5/12)]

(1) 4=108/27 108/27-18/27=90/27=10/3
(2) 3/8*3/8=9/64
(3) 7/4*7/9=49/36 49/36+5/12=49/36+15/36=64/36=16/9
(4)10/3÷8/3=10/3*3/8=5/4
(5) 9/64*16/9=2/8=1/4
(6) 5/4+1/4=6/4
(7) 1/7*6/4=1/7*3/2=3/14
(8 ) 5/30-3/14=1/6-3/14=7/42-9/42=-2/42=-1/21
so the answer is [c] -1/21!!!! I think...
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Well done

Post  Admin on Mon Jan 10, 2011 7:24 pm

That is excellent! well done Meejin. That question was from a Maths test at Queen Marry University!
Do you want to create a question of your own and post it here?


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I AGREE WITH MEEGIN!!!!

Post  kalmengistu on Tue Jan 11, 2011 5:49 am

Hi
I agree with what Meejin posted.I did it myself without looking and got 1/21. My calculations are exactly like Meejin's so i won't need to post it up. The answer is 1/21. Very Happy
Thats what i think. Neutral If you have any other answers i would like to know.


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New question!

Post  Meejin on Sat Jan 15, 2011 7:40 am

It's a new question!

Q There is a watermelon here.
The weight of the watermelon is 10kg. And the water density
of that watermelon is 99%.
Then the water evaporated from the watermelon by strong sunlight of Jordan for
a long time.
We checked it again.
Now the water density of the watermelon became 98%.
Then,what happened to the weight of the watermelon?
In other words, what is the total weight of the watermelon(98% water density)?

10kg-99%
?kg-98% ?= new weight of the watermelon

This question is by my father. I'm even trying to find out the answer.
My father doesn't let me know the answer! He told me to think by myself.
If anybody finds out the answer..... let me know...
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