9:50 Puzzle

Can you make this statement true by adding just one small line?

Nine Fifty

Topics: Starter | Puzzles

  • Carol Lowry, Sheffield Park Academy
  • Wednesday, May 16, 2007
  • "Make this sum correct by adding one straight line

    5+5+5=550


    Answer 545+5=550
    Many others similar of course!"
  • R Rees,
  • Tuesday, May 25, 2010
  • "One pupil did 10 10 10 ≠ 9:50 which I thought was excellent."
  • Millicent, Martham Primary School
  • Sunday, May 30, 2010
  • "This was a big brain teaser it made me work really had but I did it in the end. I think that you should try this one because it really gets you going for the rest of the day!!!"
  • Paul Trickett, Prt1960@hotmail.com
  • Sunday, December 12, 2010
  • "My Puzzle is as follows....
    Move one Digit in this sum to make it correct...
    103 - 102 = 3
    Ans.....
    103 - 102 = 3.

    Great idea Paul. It has been created as an animation below. Transum"
  • Prince Of Maths, West Yorkshire
  • Tuesday, May 17, 2011
  • "Once, there was a prince called Bob. His father said to him:-
    I rode into town on Friday, stayed for 3 days, and rode back out on Friday, how did I do it?"
  • S2 Maths Class Holyrood, Holyrood Secondary
  • Thursday, May 26, 2011
  • "Qaisar solved this in two seconds. We all thought this was great!! Mrs Boussouara's S2 maths class rules!!R.O.F.L."
  • Rhys, Barclay Primary
  • Wednesday, May 2, 2012
  • "How do you make this true. 1-1=2 just one line
    A. 1+1 =2."
  • , Emily
  • Tuesday, May 29, 2012
  • "103-2=11
    Move one number
    A: 13-2=11."
  • Kieran, Icknield
  • Wednesday, May 30, 2012
  • "Can you find the right answer, by moving 1 line?
    56-42+72=26
    56+42-72=26
    what do you think?"
  • Maths N Laughs, Yate, S Glos
  • Wednesday, May 30, 2012
  • "How about this one,
    The solution to sinx = nx is x = 6, can you work out how?
    The answer is to simply divide both sides by n:
    si x = x
    :)
    A little maths joke I hope you agree!"
  • Rebecca Wathen, Worfield Primary School
  • Wednesday, May 30, 2012
  • "0.5 = 1 - 2
    Move two items in this number sentence to make it correct.
    Answer 0.5 = 1/2."
  • Reilly Stallard-Gorton, Worfield
  • Wednesday, May 30, 2012
  • "103 + 104 = 1207
    Move 1 number to make this true.
    You have to move the 1 from the instructions to the beginning of the calculation!
    1103 + 104 = 1207."

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.

If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:

Excellent, I would like to see more like this
Good, achieved the results I required
Satisfactory
Didn't really capture the interest of the students
Not for me! I wouldn't use this type of activity.

This starter has scored a mean of 4.3 out of 5 based on 173 votes.


Previous Day | This starter is for 30 May | Next Day

 

Can you make up a puzzle like this? An equation or identity which is not true but can be made true by adding a line or a point. Your puzzle can be featured on this page. Enter your puzzle here.


Laptops In Lessons

Teacher, do your students have access to computers?
Do they have Laptops in Lessons or iPads?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here is the URL for a concise version of this page without comments or answers.

Transum.org/go/?Start=May30

Here is the URL which will take them to another lateral thinking puzzle.

Transum.org/go/?to=Stick

 

 




Apple

©1997-2014 WWW.TRANSUM.ORG