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Earn +20 ptsQ: What are the composite numbers between 20 and 80?
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What is the sum of all composite numbers between 70 and 80?
452
Composite numbers between 80 and 90?
All of them except for 83 and 89 which are prime numbers
What are 2 composite numbers between 60 and 90?
60 and 80 :D
How many composite numbers between 80 and 100?
All of them except 83, 89 and 97 which are prime numbers
Why are 70 and 80 prime numbers?
ANSWER: 70 and 80 are not prime numbers. They are composite numbers:70 is a composite number because the factors of 70 other 1 and itself (70) are 2, 5, 7, 10, 14, and 35.80 is also a composite number because the factors of 80 other 1 and itself (80) are 2, 4, 5, 8, 10,16, 20, and 40.
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