Letters in Numbers

A Maths Starter of The Day

Can You Find...

... an even number with an odd number of letters?

 

... a square number with a prime number of letters?

 

... a cube number with a triangular number of letters?

 

... an odd number with an even number of letters?

 

... a prime number with a square number of letters?

 

... a triangular number with a cube number of letters?

 

 

 

 

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Keywords: Starter | Number Patterns

  • Mr Hamshaw-Hart, Beverley Grammar School
  • Tuesday, April 15, 2008
  • "For the extension question... Which numbers have the same number of letters as their value? Top set year 11 also found 'positive fifteen'"
  • Linda Dunbar,
  • Tuesday, April 14, 2009
  • "I love the idea of this, but would be helpful if it was seperated into grade levels. I'd especially love to see something geared towards younger children (I teach Kindergarten)."
  • M Vestey, Sheffield
  • Thursday, May 07, 2009
  • "Strictly speaking, 1 is not a prime number, it is the multiplicative identity."
  • Mr Taylor, Gartree High School, Leicester
  • Tuesday, April 13, 2010
  • "Nice activity, thanks!
    But... prime numbers all have 2 factors, one and themselves, so one is not a prime number as it only has one factor.
    Also, could you move the extension question to below the original problem please? It's not any help below the answers as you don't see it until everybody's finished."

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This starter has scored a mean of 3.3 out of 5 based on 18 votes.

 

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Answers
 
... an even number with an odd number of letters?

2

... a square number with a prime number of letters?

1

... a cube number with a triangular number of letters?

1

... an odd number with an even number of letters?

5

... a prime number with a square number of letters?

5

... a triangular number with a cube number of letters?

66

 

Extension: Which numbers have the same number of letters as their value?

 

 

 

The answer to the extension is only 4.

What about other languages.

Students could search for the answer to this question on the Internet.
Let us know what you find!


Computer Teacher, do your students have access to computers?
Do you have "Laptops in Lessons"?

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

Laptop

Here is the URL which will take them to a concise version of this page.

Transum.org/go/?Start=April14

Here's the URL which will take
students to a page which generates the sequences mentioned in this activity.
Can you make up some other questions like these? Let us know.

http://www.transum.org/go/?to=sequences