SSC Gifted & Talented

Lewis Hamilton and his driver buddies are sponsored by Vodafone but they have a problem! They are always having to change their mobile phone numbers and need ones that are easy to remember – some seem to have a pattern about them!

His old number used to 44 2244668800

Let’s have a look at how we might invent some mobile phone numbers that would be easy to remember. We’ll start with a number and a simple rule that gives us the next number. For example:

• Start with 1 and add 2 each time
  • 1 3 5 7 etc
• When the number is bigger than 9 we could just write down the units figure
  • 1 3 5 7 9 1 3 5 7 9 1 3

Let’s take this bit further. We could start with any of the numbers 1 to 9

• Start with a different number and add 2 on each time. What do you notice?
• Try adding 3 on each time – starting with 1 then 2 then 3 …