Factuples

How many numbers below are factors of other numbers in the table?

 19   20   11   26 
 6   37   35   12 
 22   32   20   23 

How many numbers above are multiples of other numbers in the table?

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A Mathematics Lesson Starter Of The Day


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Topics: Starter | Factors | Number

  • Mrs.Smith, Staffordshire
  •  
  • Every number is a factor of itself and a multiple of itself, so your totals are incorrect!
  • Mr Hand's UR Set, The King's School Worcester
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  • Actually Mrs Smith, if you read the question properly, you will see the word "other". Thus meaning numbers being factors and multiples of themselves is totally and utterly irrelevant.
    UR Set 7 sincerely hope this clears you misunderstanding.
  • Mr Walsh, ASCPS
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  • Aside form the other listed factors, surely 10 is not only a factor of 40, but also a factor of 20? Is that too simple?
  • Transum,
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  • How many people are caught out when a number is repeated in the grid above (different numbers appear each time the page is refreshed)? So for example if 47 appears twice you can count both of them as being factors of other numbers in the grid because the first 47 is a factor of the second 47 and the second is a factor of the first!
  • Mrs S, St Albans
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  • Shouldn't the number of factors and the number of multiples be the same? If A is a factor of B then B is a multiple of A, and vice versa.
  • St Nicolas Junior School, Newbury, Year 5
  •  
  • We like the way the maths is set out however
    we found more answers than your listed ones.

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

 

Answers

19 20 11 26
6 37 35 12
22 32 20 23

20 is a factor of 20
11 is a factor of 22
6 is a factor of 12
20 is a factor of 20


Number of Multiples = 4

19 20 11 26
6 37 35 12
22 32 20 23

20 is a multiple of 20
12 is a multiple of 6
22 is a multiple of 11
20 is a multiple of 20

Change Numbers:

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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=July30

While factors are in mind follow this URL to a student version of the Sieve of Eratosthenes.

Transum.org/go/?to=Sieve

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