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Earn +20 ptsQ: Which numbers less than 100 have odd proper factors?
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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.
Is the number 9 prime?
No 9 is not prime. It's factors are 1,3,9. Proper factors: 1,3. Factors are numbers that are multiplied with other numbers to get a product. Proper factors are factors of a number except for itself. Composite numbers are numbers with more than 2 factors and more than 1 proper factor. Prime is the opposite of composite.
What are two consecutive numbers less than 100 that have four proper factors?
44 and 45 75 and 76 98 and 99
Are mixed numbers less than proper fractions?
No.
What numbers would have less than two factors?
Prime numbers
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