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Q: How many composite numbers are there between 70 and 90?

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

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

Between 60 and 70 the composite numbers are: 62, 63, 64, 65, 66, 68, 69. 60 and 70 are also composite.

51

there are 62,63,64,65,66,68,69 and 70

There are 15 composite numbers greater than 50 but less than 70

452

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

160

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

The composite numbers are: 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86 ,87, 88

There are two prime numbers between 60 and 70.

There are 34,019 whole numbers between 70 and 34,089.

60, 62, 63, 64, 65, 66, 68, 69, 70

The odd numbers between 70 and 90 are 71, 73, 75, 77, 79, 81, 83, 85, 87, and 89. We know right away that 75 and 85 are composite, since they're divisible by 5. 81 is composite since it is the square of 9. 77 is obviously divisible by 11, so it, too, is composite. 87 is divisible by 3 since 8 + 7 = 15, which is divisible by 3. Therefore, and trust me, I double-checked the rest, 75, 77, 81, 85, and 87 are the composite, odd numbers between 70 and 90.

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

70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85 (including 70 and 85)

All of them except for 53, 59, 61 and 67 which are prime numbers because they have only two factors.

53, 59, 61, 67.

2-69

Two prime numbers, 61 and 67, are the only prime numbers between 60 and 70.

the halfway point is 60 61 62 63 64 /.65./ 66 67 68 69 70

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, ...

Composite numbers less than 70 and greater than 60 are 62, 63, 64, 65, 66, 68 and 69.

List all prime and composite numbers between 30 to 70

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