Factors microlesson
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Factors are the numbers you multiply together to find a product. Every number has at least two factors, one and itself. The number 12 has 1 x 12, 2 x 6 and 3 x 4, for a total of six factors. The factor pairs for 32 are 1 and 32, 2 and 16 and 4 and 8. When you want to make a list of your factors from least to greatest, you connect the rainbow on each end with your factors starting with the least and going to the greatest. 3 x 5 is 15 if I put commas in between there's my list from least to greatest. When you look at the number 20, we notice 20 is an even number, so it must have a factor of two. We also know that it ends in zero, so it will have factors of both 5 and 10 so now you know how to find factors of a number
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Which number is a factor of 20?
1) All of the above.2) 23) 44) 10 
Which number is not a factor of 60?
1) 82) 23) 44) 6 
How many factors does 27 have?
1) 42) 23) 34) 4 
How many factors does 13 have?
1) 22) 33) 14) 4 
How many factors does 17 have?
1) 22) 33) 44) 5 
How many factors does 12 have?
1) 62) 43) 24) 12 
Which factor do the numbers 12 and 18 share?
1) 62) 43) 84) 9 
How many factors does 16 have?
1) 52) 43) 74) 3 
What is the greatest common factor of 12 and 18?
1) 62) 43) 14) 2 
What is the greatest common factor of 16 and 24?
1) 82) 43) 64) 2 
Which is not a factor of 32?
1) 62) 83) 24) 16 
If a number ends in a zero, it has a factor of _______.
1) all of the above2) 103) 54) 2 
Which is the correct list of factors for 15?
1) 1, 3, 5, 152) 1, 2, 3, 153) 1, 3, 9, 154) 1, 2, 5, 15 
Which is the correct list of factors for 24?
1) 1, 2, 3, 4, 6, 8, 12, 242) 1, 2, 4, 6, 8, 9, 243) 1, 3, 4, 6, 7, 12, 244) 1, 2, 3, 4, 6, 8, 9, 12 
12 is a common factor of what 2 numbers?
1) 36 and 482) 12 and 203) 18 and 364) 28 and 32 
Which is a factor pair for 42?
1) 3 and 142) 2 and 223) 4 and 84) 13 and 4 
Which of these is a factor pair of 32?
1) 4 and 82) 3 and 63) 2 and 184) 4 and 9 
Which is a factor pair for 48?
1) 4 and 122) 6 and 93) 7 and 84) 8 and 9 
What is a factor pair for 54?
1) 6 and 92) 7 and 93) 5 and 44) 7 and 8 
Multiply 2 or more factors to find the __________.
1) Product2) Sum3) Difference4) Quotient 
Will the product of 2 even factors always be even?
1) Yes2) No 
Will a number always have at least 2 factors?
1) Yes2) No 
Can 2 be a factor of an odd number?
1) No2) Yes 
Is 4 a factor of 14?
1) No2) Yes 
Do 15 and 18 have the same number of factors?
1) No2) Yes 
Will the product of 2 odd factors always be odd?
1) No2) Yes
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