Upside Number

Fonia noticed that her phone number read the same when viewed upside down.

Her number began 081 and was followed by seven digits.

Fonia

The two digit number formed by the fifth and sixth digits is divisible by eleven.

The two digit number formed by the fourth and fifth digits is divisible by nine.

The two digit number formed by the sixth and seventh digits is a square number.

What is Fonia's phone number?

Updide Number

A Mathematics Lesson Starter Of The Day


Share

Topics: Starter | Number | Puzzles

  • Sue Mainstone, Sir Charles Lucas arts college
  •  
  • Should have said todays number was planindromic as well
  • Micky Bullock, Harrogate
  •  
  • Another solution is 0816336180.
  • Miss Gilleece, Boldon School
  •  
  • My 9A1 got the answer in 3.2 minutes, Chris was the first to come up with the correct answer.......which is quite amazing considering!!!
  • Mrh, Neb
  •  
  • I had a student had completed this in less than two minutes! Can anyone beat that!
  • Jay, Yeates
  •  
  • Micky, your answer is wrong as it isn't the same when read upside down.
  • Cheryl Joinson, Sychdyn School
  •  
  • I'm using starter of the day every mornign in my primary class.
    Our answer was 0811881180 but we have no way of checking if we are correct.
  • Geraint White, Hadleigh High School
  •  
  • I got 0819116180.
  • Fran,
  •  
  • Another soloution is 0816699180.
  • Cheryl, Sychdyn Primary School
  •  
  • Geraint & Fran sorry but both your answers are wrong - the corect answer is at the bottom of this page - and my primary school class got it right! :-).
  • Sally S, Barham School
  •  
  • Love reading the comments - sometimes V competitive between teachers themselves;).
  • Mr. Dean, Varee International
  •  
  • What about 0810000180?
  • 5DC, Lee On The Solent Junior School
  •  
  • We think the answer is 0811881180 :).
  • Top Group Y5, ST JOHN'S SCHOOL
  •  
  • The boys loved this.
  • Mr P Darch, FMS - Tom, Luke And Lucy
  •  
  • Enjoyed this and my Year 6 class solved in about 4 minutes.
    By the way the only answer is 0811881180 - the others either do not look the same upside down or do not satisfy the other rules.
  • Mr Staples, Otamatea High School
  •  
  • My students enjoyed this and some found it quite easy Two boys completed in 2 minutes.

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.

Previous Day | This starter is for 8 March | Next Day

 

Answer

Can you make up some clues for your own phone number?



Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon search box and some items chosen and recommended by Transum Mathematics to get you started.

 

Rubiks Cube Puzzle

Apple iPad Pro

The analytics show that more and more people are accessing Transum Mathematics via an iPad as it is so portable and responsive. The iPad has so many other uses in addition to solving Transum's puzzles and challenges and it would make an excellent gift for anyone.

The redesigned Retina display is as stunning to look at as it is to touch. It all comes with iOS, the world's most advanced mobile operating system. iPad Pro. Everything you want modern computing to be. more...

Before giving an iPad as a Christmas gift you could add a link to iPad Maths to the home screen.

Math with Bad Drawings

I had been tutoring the wonderful Betsy for five years. When the day came for our last ever session together before the end of her Year 13, I received this beautiful book as a gift of appreciation.

This a very readable book by Ben Orlin. I'm really enjoying the humour in the writing and the drawings are great.

Ben Orlin answers maths' three big questions: Why do I need to learn this? When am I ever going to use it? Why is it so hard? The answers come in various forms-cartoons, drawings, jokes, and the stories and insights of an empathetic teacher who believes that mathematics should belong to everyone.

Online Maths Shop

Laptops In Lessons

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

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

Laptops In Lessons

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

Transum.org/go/?Start=March8

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=square

Student Activity


Apple

©1997-2019 WWW.TRANSUM.ORG