Factor Rainbow Fun!
Explore the concept of factor rainbows and practice finding factors of numbers in Grade 7 mathematics.
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Factor Rainbow Fun!
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A factor rainbow is a visual way to find all the factors of a number. You list the factors in order, then draw arcs connecting the pairs that multiply to give the original number. Complete the activities below.
1. In your own words, describe what a 'factor rainbow' is and how it helps you find factors of a number.
2. The factors of 24 are .
3. The factors of 36 are .
4. The factors of 50 are .
5. Draw a factor rainbow for the number 18. List all factors and connect the pairs.
6. Draw a factor rainbow for the number 42. List all factors and connect the pairs.
7. Which of the following numbers has an odd number of factors?
12
16
20
24
8. All prime numbers have exactly two factors, 1 and themselves.
True
False
9. The number 1 is a factor of every whole number.
True
False
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