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Common Factors Speed Challenge

The document presents a "speed challenge" to identify the common factors of various pairs of numbers in 3 sentences or less. It lists the numbers and their common factors, and prompts the reader to find them quickly. The completed answers are then provided.

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sfarouk78
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43 views2 pages

Common Factors Speed Challenge

The document presents a "speed challenge" to identify the common factors of various pairs of numbers in 3 sentences or less. It lists the numbers and their common factors, and prompts the reader to find them quickly. The completed answers are then provided.

Uploaded by

sfarouk78
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Find the common factors:

speed challenge
What common factors do these
sets of numbers have and how
fast can you identify them all? On
your marks, get set...

15, 35 and 90: 16, 28 and 42:


15 = 1, 3, 5, 15
35 = 1, 5, 7, 35
90 = 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

18, 99 and 270: 20, 55 and 350:

14, 28 and 77: 25, 50 and 125:

33, 180 and 990: 70, 160 and 240:

Completed in
Year 5 Maths minutes!
Find the common factors:
speed challenge answers

15, 35 and 90: 16, 28 and 42:


15 = 1, 3, 5, 15 16 = 1, 2, 4, 8, 16

35 = 1, 5, 7, 35 28 = 1, 2, 4, 7, 14, 28

90 = 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90 42 = 1, 2, 3, 6, 7, 14, 21, 42

18, 99 and 270: 20, 55 and 350:


18 = 1, 2, 3, 6, 9, 18 20 = 1, 2, 4, 5, 10, 20
99 = 1, 3, 9, 11, 33, 99 55 = 1, 5, 11, 55
270 = 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 350 = 1, 2, 5, 7, 10, 14, 25, 35, 50, 70,
45, 54, 90, 135, 270 175, 350

14, 28 and 77: 25, 50 and 125:


14 = 1, 2, 7, 14 25 = 1, 5, 25
28 = 1, 2, 4, 7, 14, 28 50 = 1, 2, 5, 10, 25, 50
77 = 1, 7, 11, 77 125 = 1, 5, 25, 125

33, 180 and 990: 70, 160 and 240:

33 = 1, 3, 11, 33 70 = 1, 2, 5, 7, 10, 14, 35, 70


180 = 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 160 = 1, 2, 4, 5, 8, 10, 16, 20, 32, 40,
30, 36, 45, 60, 90, 180 80, 160
990 = 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 240 = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16,
33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 20, 24, 30, 40, 48, 60, 80, 120, 240
495, 990

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