21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69.
70 and 90
51,52,54,55,56,57,58,60,62,63,64,65,66,68,69 are the composite numbers between 50 and 70.
452
All of them except for 61 and 67 which are 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.
The composite numbers between 70 and 80 are 72, 74, 75, 76, 77 and 78.
70 and 90
Between 60 and 70 the composite numbers are: 62, 63, 64, 65, 66, 68, 69. 60 and 70 are also composite.
51,52,54,55,56,57,58,60,62,63,64,65,66,68,69 are the composite numbers between 50 and 70.
51
there are 62,63,64,65,66,68,69 and 70
452
All of them except for 61 and 67 which are 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.
All of them except for 53, 59, 61 and 67 which are prime numbers
-20
The composite numbers are: 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86 ,87, 88