31, 37, & 41 are prime; 32,33,34,35,36,38,39 & 40 are composite.
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All numbers other than 11, 13 ,17, 19 ,23,29, 31 are composite numbers. eg 10,12,14,15, are composite numbers.
The composite numbers between 30 and 40 are: 32, 33, 34, 35, 36, 38 and 39. The prime numbers between 30 and 40 are 31 and 37. Note: 30 and 40 are also composite numbers.
Composite numbers are positive integers greater than 1 that have more than two factors. Between 31 and 41, the composite numbers are 32, 33, 34, 35, 36, 38, 39, and 40. These numbers can be divided by numbers other than 1 and themselves, making them composite.
All of them except for 31, 37, 41, 43 and 47 which are prime numbers.
31 and 47 are prime, the rest composite.