It is 43 because 2*43 = 86
There are multiple: 41, 43, and 47.
It is 43 because 2 times 43 = 86
37 is a prime number between 30 and 40.
There are two prime numbers between 30 and 40 - these are 31 and 37.
37
No multiple of 86 is in that range. 43 is a prime number that is a factor of 86.
There are multiple: 41, 43, and 47.
It is 43 because 2 times 43 = 86
37 is a prime number between 30 and 40.
47 - 31 = 16
37
520. 13 is a prime number and not a factor of 40.
There are two prime numbers between 30 and 40 - these are 31 and 37.
37
The numbers 31 and 37 are prime.
A prime number won't be divisible by 5
The prime factorization of 32 is 2x2x2x2x2 or 25. The prime factorization of 40 is 2x2x2x5 or 23x5. For a number to be a multiple of a given number the multiple must have the entire prime factorization of that number in is. So a multiple of 32 must contain 2x2x2x2x2 or 25 . Likewise a multiple of 40 must contain 2x2x2x5 or 23x5. The least number that this could possible happen with must have 5 factors of 2 and one factor of 5 (the highest exponent on each individual prime factor). Thus the LCM is 2x2x2x2x2x5 or 25x5 Which is 160.