9:50 Puzzle

Starter of The Day Transum Mathematics Topics

Carol Lowry, Sheffield Park Academy
Make this sum correct by adding one straight line

5+5+5=550

Answer 545+5=550
Many others similar of course!
R Rees,
One pupil did 10 10 10 ≠ 9:50 which I thought was excellent.
Millicent, Martham Primary School
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
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
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
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
How do you make this true. 1-1=2 just one line
A. 1+1 =2.
Emily,
103-2=11
Move one number
A: 13-2=11.
Kieran, Icknield
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
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
0.5 = 1 - 2
Move two items in this number sentence to make it correct.
Answer 0.5 = 1/2.
Reilly Stallard-Gorton, Worfield
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.
Matthew Zhao, Year 7, Brisbane Boys' College, Toowong, Brisbane
I have a maths puzzle:
41+1=25
You are allowed to rub out only 1 part anywhere in the sum.
Answer:
4!+1=25.
Ramesh P, APL Global School
One of my students in grade IX gave the correct solution.

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

Answers

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.

Extension 1: Move One Number

103 − 102 = 3

Can you move just one number to make the statement above correct?

Extension 2: Move One Item

0.5 = 12

Can you move just one item to make the statement above correct?

Extension 3: Move One Digit

19 − 11 = 1108

Can you move just one digit to make the statement above correct?

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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:

Transum.org/go/?Start=May30

However it would be better to assign one of the student interactive activities below.

Laptops In Lessons

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

Transum.org/go/?to=stick