Q: What are all the composite numbers from 40 to 70?

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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.

452

51,52,54,55,56,57,58,60,62,63,64,65,66,68,69 are the composite numbers between 50 and 70.

All of them except for 61 and 67 which are prime numbers

All of them except for 53, 59, 61 and 67 which are prime numbers

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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.

452

51,52,54,55,56,57,58,60,62,63,64,65,66,68,69 are the composite numbers between 50 and 70.

All of them except for 61 and 67 which are prime numbers

40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70 (including 40 and 70).

The composite numbers between 70 and 80 are 72, 74, 75, 76, 77 and 78.

All of them except for 53, 59, 61 and 67 which are prime numbers

All of them except for 53, 59, 61 and 67 which are prime numbers

For instance, all the even numbers greater than 70 are composite.The next few composite numbers greater than 70 are: 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, ...

all the compounds in the world are either 50 70 115 150

They are all the numbers except 71 73 79 83 89 and 97 which are prime numbers

40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70