Missing Terms

A Maths Starter of The Day

Find the missing terms from these sequences:

1,   4,   7,   10,  __   11,  __  __  65,  __
4,  __  10,  __  16   6,  __  __  __  110
0,  __  4,  __  __   -14,  __  __  40,  __
12,  __  __  51,  __   21,  __  __  -21,  __
14,  __  __  71,  __   29,  __  __  -4,  __

Looking for the missing terms

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Keywords: Starter | Number Patterns | Puzzles | Sequences

  • Primary 7, Bargeddie Primary School, North Lanarkshire
  • Tuesday, April 19, 2011
  • "We were all really impressed by Thomas who managed to get them all right really quickly!"

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Answers

1, 4, 7, 10, 13   11, 29, 47, 65, 83
4, 7, 10, 13, 16   6, 32, 58, 84, 110
0, 2, 4, 6, 8   -14, 4, 22, 40, 58
12, 25, 38, 51, 64   21, 7, -7, -21, -35
14, 33, 52, 71, 90   29, 18, 7, -4, -15

These answers assume that the sequences are linear. Many other answers are possible if students don't make this supposition.

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.

Extension

What would be the nth term of each of these sequences?

 

Extension Answers

3n - 2   18n - 7
3n + 1   26n - 20
2n - 2   18n - 32
13n - 1   -14n + 35
19n - 5   -11n + 40

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=April16

Here's the URL which will take
them to a student version of this activity.

www.transum.org/go/?to=Missing