All of them except for 53, 59, 61 and 67 which are prime numbers
There are 15 composite numbers greater than 50 but less than 70
51,52,54,55,56,57,58,60,62,63,64,65,66,68,69 are the composite numbers between 50 and 70.
53, 59, 61, 67.
70 and 90
There are 41 composite numbers from 50 to 100. Some of the composite numbers from 50 to 100 are 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, and 70.
30 50 70 because they both end in 0 and 10 is a composite number
All of them except for 53, 59, 61 and 67 which are prime numbers
51
all the compounds in the world are either 50 70 115 150
There are 4 prime numbers from 50 to 70:53, 59, 61 and 67
50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70
I suggest you look up a table of prime numbers. Any integer treater than one that is not in the table of prime numbers is a composite number.