Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    12
    ReputationRep:
    My little sister needs help with this question:

    Two discs each with a number on both of their faces are tossed into the air. The two numbers that can be seen when the discs land are added to get a total. This is repeated three more times, and the totals obtained were 5, 11, 19, 25. Two of the original numbers were bigger than 10. What four numbers are written on the faces of the discs?
    Offline

    12
    ReputationRep:
    ok, so if you work logically, it is aparrent that to get 5, the only possible combinations are 4+1, or 2+3. these will thus account for the two numbers below 10. Then, moving on to 11, the only combination of numbers utilising one of these 4, while allowing the second number to be 10 or greater is 1 and 10. So we have 1,4, 10 so far. the final number must then be 15, as 4 + 15 is 19. so, 1,4,15,10
    Hope this helps
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What newspaper do you read/prefer?
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.