Sunday, 4 November 2012

7 + 7 / 7 + 7 x 7 - 7


7 + 7 / 7 + 7 x 7 - 7 = ?

Answer: 50

According to D.M.A.S rule,

= 7 + 1 + 7 x 7 - 7
= 7 + 1 + 49 - 7
= 57 - 7
= 50

19 comments:

  1. But we know that 7+7/7+7*7-7 = 7*(1+1/1+1*1-1) so the answer is actually 14.

    ReplyDelete
    Replies
    1. (or alternately, 50=14 Q.E.D.)

      Delete
    2. 7*(1+1/1+1*1-1) this is wrong
      actully should say 7*(1 + 1/7 + 7 - 1) =
      7(1/7 + 49/7) = 7*50/7 = 50

      Delete
    3. haha brilliant ! but no its 50 !

      Delete
  2. because according to DMAS rule ans is 50

    ReplyDelete
  3. 7 + 7 / 7 + 7 x 7 - 7=?
    my ans:
    =7 + 7 / 7 + 7 x 7 - 7
    =7+1+7 x 7-7
    =7+1+49-7
    =57-7
    =50

    ReplyDelete
  4. The rules of mathematics state that you start with multiplication and division first. Do not try to solve a mathematical problem like you're reading a paragraph (From left to right)

    ReplyDelete