Posers and Puzzles

Posers and Puzzles

  1. Joined
    25 Sep '05
    Moves
    52
    29 Sep '05 05:47
    There are two men, John & Peter. John is 2x as old as Peter was when Peter was 2x as old as John. When you add their ages together you get 72.

    How old are they?
  2. Phoenix, AZ
    Joined
    24 Sep '05
    Moves
    379
    29 Sep '05 06:22
    Originally posted by JamesScott
    There are two men, John & Peter. John is 2x as old as Peter was when Peter was 2x as old as John. When you add their ages together you get 72.

    How old are they?
    Let the younger age of John be x

    2(2x) + (2(2x) + x) = 72
    9x = 72
    x = 8

    John is 32 and Peter is 40
  3. Phoenix, AZ
    Joined
    24 Sep '05
    Moves
    379
    29 Sep '05 06:31
    I've been doing problems like these in school recently. Here's one:

    A purse containing $4.80 in quarters and dimes has, in all, 30 coins. How many of each coin was there?
  4. Standard memberXanthosNZ
    Cancerous Bus Crash
    p^2.sin(phi)
    Joined
    06 Sep '04
    Moves
    25076
    29 Sep '05 06:43
    Originally posted by c1arinetboy
    I've been doing problems like these in school recently. Here's one:

    A purse containing $4.80 in quarters and dimes has, in all, 30 coins. How many of each coin was there?
    x*0.25 + y*0.1 = 4.8
    x + y = 30

    I leave the rest as an exercise for the reader.

    (Lol DeBranges)
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