Maths World

Welcome to my 'World of Maths!'

On here you will find all sorts of maths games and activities to have a go at.  
!!NEW!!
March 2012:    
HOLIDAY CHALLENGE!


Using 1 3 6 once each, and + - x ÷, which TWO of the 

following numbers CANNOT be made? 


1 2 3 4 7 8 9 10 12 15 17 18 19 20 21 24






Finding fractions of a number








Have a go at this challenge:

I have fifteen cards numbered 1 - 15.

I put down seven of them on the table in a row.

7 cards

The numbers on the first two cards add to 15
The numbers on the second and third cards add to 20
The numbers on the third and fourth cards add to 23
The numbers on the fourth and fifth cards add to 16 
The numbers on the fifth and sixth cards add to 18
The numbers on the sixth and seventh cards add to 21 
What are my cards?

Can you find any other solutions?
How do you know you've found all the different solutions?

19 comments:

  1. AnonymousSeptember 5, 2011 at 5:25 PM

    I don,t no how to type in the numbers could you show me again please






    By Emma

    ReplyDelete
  2. AnonymousSeptember 6, 2011 at 11:37 AM

    You just need to use the numbers on your keyboard to type in what you think the answer is.
    Mrs. Elrick

    ReplyDelete
  3. AnonymousSeptember 6, 2011 at 9:14 PM

    Mrs. Elrick,
    When are we gonna start letting us putting us in the math group
    John

    ReplyDelete
  4. AnonymousSeptember 7, 2011 at 8:55 PM

    mrs. Elrick,
    I know the answer,
    their is three kind of answer It is
    A. 6,9,11,12,4,14,7
    B. 7,8,12,11,5,13,8
    C. 8,7,13,10,6,12,9
    the method I used is trial and improvement.
    JOHN

    ReplyDelete
  5. AnonymousSeptember 7, 2011 at 10:08 PM

    This comment has been removed by a blog administrator.

    ReplyDelete
  6. AnonymousSeptember 8, 2011 at 7:15 AM

    Fantastic work John, very well done.
    I think that deserves 3 merits - 1 for each way that you found!
    Keep up the good work!

    Mrs. Elrick

    ReplyDelete
  7. AnonymousSeptember 10, 2011 at 2:28 PM

    Mrs. Elric,
    I got the answer there are six answers,
    A. 5,10,10,13,3,15,6
    B. 6,9,11,12,4,14,7
    C. 7,8,12,11,5,13,8
    D. 8,7,13,10,6,12,9
    E. 9,6,14,9,7,11,10
    F. 10,5,15,8,8,10,11

    Best Wishes,
    Silvia

    ReplyDelete
  8. AnonymousSeptember 10, 2011 at 2:35 PM

    I listed all the possibilities I can think of I tried to fit it in the cards and then cross of the ones that can't fit in and finally I got the answers above.

    Best Wishes,
    Silvia

    ReplyDelete
  9. AnonymousSeptember 10, 2011 at 2:48 PM

    Wow Silvia, you've been busy today! You've worked very well on this. i think you are only supposed to use a number once, but this is very good working out.
    Come and see me on Tuesday and I will give you your merits for having a go.

    Have a good long weekend.
    Mrs. Elrick

    ReplyDelete
  10. AnonymousSeptember 10, 2011 at 7:11 PM

    Thank you Mrs. Elric! I am so happy, I think I have already had a very nice long weekend!
    Wish you have a really nice long weekend,too!

    Silvia

    ReplyDelete
  11. AnonymousSeptember 10, 2011 at 8:28 PM

    After I read your post , I understood that actually there are only TWO solutions! They are: B. And D.!


    Silvia

    ReplyDelete
  12. AnonymousSeptember 10, 2011 at 8:35 PM

    Silvia, you are quite right. Fantastic work!

    Mrs. Elrick

    ReplyDelete
  13. danielNovember 21, 2011 at 1:37 AM

    good work everyone!!!!!!!!!!!

    ReplyDelete
  14. AnonymousDecember 16, 2011 at 4:01 PM

    why cant you go to mathematics


    wenting

    ReplyDelete
  15. AnonymousDecember 17, 2011 at 9:12 AM

    Hi Wen Ting,
    It is because we had it as a trial to see if we liked it. Did you like it?

    Mrs.Elrick

    ReplyDelete
  16. AnonymousJanuary 6, 2012 at 9:10 PM

    yes i like it very much!!

    ReplyDelete
  17. AnonymousMay 4, 2012 at 9:09 PM

    i like it very much

    ReplyDelete
  18. AnonymousMay 25, 2012 at 7:01 PM

    I love mathes world

    ReplyDelete

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