+ Reply to Thread
Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 38
  1. #21
    Join Date
    Oct 2012
    Posts
    319
    Thanks
    62
    Thanked
    123
    Reviews
    1
    Hahaha I so didnt read it as they had their own money to begin with..
    That makes so much more sense that how I was was doing it! Toooo Clever leisylou!!

  2. #22
    Join Date
    Sep 2013
    Posts
    1,416
    Thanks
    12,338
    Thanked
    5,046
    Reviews
    0
    Achievements:Topaz Star - 500 posts
    Quote Originally Posted by CMF View Post
    Oh my gosh how did you dooooo that???
    I haven't checked the answer with him but it certainly looks right!
    Did you just guess random numbers or did you actually have a methodical way of working it out?
    If I read the question correctly and it was hypothetical, not sequential (does that make sense?) there wasn't a proper method, I just kind of worked backwards :-)

    For Alice to give away a quarter, hers had to be under $25 as otherwise she would have started with $100 and couldn't have gotten anything off Bill to make it up to the $100. Claire's had to be divisible by 3 as she was giving away a third, and it couldn't be less than $75 as she was getting a quarter of Alice's and hers was under $25. So then I kind of worked the multiples of 3 between $81 & $90 for Claire and got to it that way...

  3. #23
    Join Date
    Oct 2008
    Posts
    2,369
    Thanks
    500
    Thanked
    1,489
    Reviews
    0
    Achievements:Topaz Star - 500 postsAmber Star - 2,000 posts
    Simultaneous equations?
    So if a=amount Alice has, etc
    Then the three statements equate to:
    a+b/2=100
    b+c/3=100
    c+a/4=100

    Rearrange and solve for a, b and c?

  4. The Following User Says Thank You to deku For This Useful Post:

    Summer  (27-02-2015)

  5. #24
    Join Date
    Feb 2006
    Posts
    4,222
    Thanks
    894
    Thanked
    3,219
    Reviews
    0
    Achievements:Topaz Star - 500 postsAmber Star - 2,000 posts
    Quote Originally Posted by Leisylou View Post
    If I read the question correctly and it was hypothetical, not sequential (does that make sense?) there wasn't a proper method, I just kind of worked backwards :-)

    For Alice to give away a quarter, hers had to be under $25 as otherwise she would have started with $100 and couldn't have gotten anything off Bill to make it up to the $100. Claire's had to be divisible by 3 as she was giving away a third, and it couldn't be less than $75 as she was getting a quarter of Alice's and hers was under $25. So then I kind of worked the multiples of 3 between $81 & $90 for Claire and got to it that way...
    Ermmmm.... ok..... lol.
    Very well done LeisyLou!
    I was playing around with numbers around what yours were, but just couldn't get there. I was trying to find a multiple of 3 and multiple of 4 etc but it just did my head in!

  6. The Following User Says Thank You to CMF For This Useful Post:

    Summer  (27-02-2015)

  7. #25
    Join Date
    Feb 2006
    Posts
    4,222
    Thanks
    894
    Thanked
    3,219
    Reviews
    0
    Achievements:Topaz Star - 500 postsAmber Star - 2,000 posts
    Quote Originally Posted by deku View Post
    Simultaneous equations?
    So if a=amount Alice has, etc
    Then the three statements equate to:
    a+b/2=100
    b+c/3=100
    c+a/4=100

    Rearrange and solve for a, b and c?
    That's exactly what I had written down on my piece of paper, but then realised I don't know how to do simultaneous equations lol.

  8. #26
    Join Date
    Oct 2008
    Posts
    2,369
    Thanks
    500
    Thanked
    1,489
    Reviews
    0
    Achievements:Topaz Star - 500 postsAmber Star - 2,000 posts
    Quote Originally Posted by CMF View Post
    That's exactly what I had written down on my piece of paper, but then realised I don't know how to do simultaneous equations lol.

    2015-02-27 11.35.41.jpg

  9. #27
    Join Date
    Oct 2008
    Posts
    2,369
    Thanks
    500
    Thanked
    1,489
    Reviews
    0
    Achievements:Topaz Star - 500 postsAmber Star - 2,000 posts
    Quote Originally Posted by Leisylou View Post
    For Alice to give away a quarter, hers had to be under $25 as otherwise she would have started with $100 and couldn't have gotten anything off Bill to make it up to the $100. Claire's had to be divisible by 3 as she was giving away a third, and it couldn't be less than $75 as she was getting a quarter of Alice's and hers was under $25. So then I kind of worked the multiples of 3 between $81 & $90 for Claire and got to it that way...
    That's very clever problem solving, I'm impressed!

    Edit- i have no idea why this image keeps attaching to all my posts now, sorry!
    Attached Images

  10. #28
    Join Date
    Sep 2013
    Posts
    1,416
    Thanks
    12,338
    Thanked
    5,046
    Reviews
    0
    Achievements:Topaz Star - 500 posts
    Quote Originally Posted by deku View Post
    Wow - that's awesome! SO impressed - that is pretty freaking amazing problem solving and if I knew how to do maths I'm sure it would make sense to me!!! Brilliant brain you have :-)

  11. #29
    Join Date
    Oct 2012
    Posts
    319
    Thanks
    62
    Thanked
    123
    Reviews
    1
    What grade is your son in??

  12. #30
    Join Date
    Feb 2006
    Posts
    4,222
    Thanks
    894
    Thanked
    3,219
    Reviews
    0
    Achievements:Topaz Star - 500 postsAmber Star - 2,000 posts
    Quote Originally Posted by deku View Post
    Ok. I've been staring at this for the last 10 mins, and I'm a bit stumped lol. So I get the initial equations, and I get why you minused the 1/2b etc to the other side, but where did the a=400-4c come from? Why did you do that rather than just minus it like you did the first 2 equations?


 

Similar Threads

  1. Advanced in maths?
    By Zombie_eyes in forum General Parenting Tips, Advice & Chat
    Replies: 14
    Last Post: 28-02-2015, 19:24
  2. who's a maths wiz? Help me out!
    By Gothel in forum General Chat
    Replies: 22
    Last Post: 20-08-2014, 17:55
  3. Help with maths homework.
    By waterlily in forum General Parenting Tips, Advice & Chat
    Replies: 29
    Last Post: 24-07-2014, 19:00

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
free weekly newsletters | sign up now!
who are these people who write great posts? meet our hubbub authors!
Learn how you can contribute to the hubbub!

reviews
learn how you can become a reviewer!

competitions

forum - chatting now
sales & new stuffsee all
Hire For Baby Perth
New RETAIL store - Perth Hire For Baby Perth
Here at Hire for Baby, we offer a wide range of products from Child Restraints to Strollers, Stroller Accessories and Oricom Baby Monitors. Wholesale prices - till the stock ends. Buy from us and get the installation for FREE.
Like us on Facebook and get $10 OFF
featured supporter
Philips AVENT Australia
Pregnancy and early parenthood is an exciting and challenging time, but it’s good to know there is expert advice on hand to ensure that your baby gets the best start in life.
gotcha
X

Pregnant for the first-time?

Not sure where to start? We can help!

Our Insider Programs for pregnancy first-timers will lead you step-by-step through the 14 Pregnancy Must Dos!