Fonia noticed that her phone number read the same when viewed upside down.
Her number began 081 and was followed by seven digits.
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?
Topics: Starter  Number  Puzzles
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Can you make up some clues for your own phone number?
Can you write down a valid mathematical operation that is also true when viewed upside down?
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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=March8 However it would be better to assign one of the student interactive activities below. 
