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Prime numbers
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∙ 12y ago
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What number less than 19 has more than 4 factors?
There are a few numbers that are less than 19 and have more than 4 factors. The number 10 is less than 19 and has more than four factors.
How many numbers are there less than thirty have exactly 6 factors?
Four numbers less than thirty, 12, 18, 20, and 28, each have exactly 6 factors.
The sum of the proper factors of 4 is less than 4 List all the numbers through 50 for which the sum of its proper factors is one less than the number itself?
The numbers for which the sum of its proper factors is 1 less than the number is the powers of 2; less than 50 these are: 2, 4, 8, 16 & 32.
How many numbers less than 100 have 5 factors?
10,20,30,40,50,60,70,80,90
Which numbers less than 100 have odd proper factors?
Square numbers, like 36 and 64.
What is special about numbers less than fifty that have less than three factors?
They all are prime numbers except 1
What number less than 19 has more than 4 factors?
There are a few numbers that are less than 19 and have more than 4 factors. The number 10 is less than 19 and has more than four factors.
Which whole number less than 100 has the fewest number of factors?
That would be 1. The only factor of 1 is 1. All other whole numbers have at least two factors. Prime numbers have exactly two factors, while composite numbers have more than two factors.
How can you determine whether the LCM of two numbers is the product of the numbers or is less than the product of the numbers explain?
If the two numbers have no common factors other than 1, the LCM will be their product. If there are other common factors, the LCM will be less.
How many numbers are there less than thirty have exactly 6 factors?
Four numbers less than thirty, 12, 18, 20, and 28, each have exactly 6 factors.
What numbers are not composite?
The ones with less than three factors.
Is -5 greater than or less than -9?
4
What whole number less than 150 has odd number of factors?
There are 12 numbers less than 150 which have an odd number of factors: 1,4,9,16,25,36,49,64,81,100,121,144.
How can you determine if the least common multiple of 2 numbers is the product of the 2 numbers or less than the product of the 2 numbers?
If the GCF of a given pair of numbers is 1, the LCM will be equal to their product. If the GCF is greater than 1, the LCM will be less than their product. Or, stated another way, if the two numbers have no common prime factors, their LCM will be their product.
The sum of the proper factors of 4 is less than 4 List all the numbers through 50 for which the sum of its proper factors is one less than the number itself?
The numbers for which the sum of its proper factors is 1 less than the number is the powers of 2; less than 50 these are: 2, 4, 8, 16 & 32.
What are the numbers less than 100 that also have 11 as a factors?
11,22,33,44,55,66,77,88,99
How many numbers less than 100 have 5 factors?
10,20,30,40,50,60,70,80,90
