Believe it or not, the number of prime numbers beginning with 8 is infinite.
8 has three primes (2x2x2) in its factorization, and 30 is the smallest number having three different primes (2x3x5) in its factorization.
eight (8)
Take your pick: 15 is the only number which is a product of 2 primes (3*5). 63 is the only number that is the products of three odd primes (3*3*7) 8 is the only cube number (22) 50 is the only number that is not one less than a square number (15=42-1, 63 = 82-1, 8 = 32-1).
the prime numbers between 8 and 24 are 11, 13, 17, 19 and 23 so five
False. Co-primes are not the same as twin primes.Co-primes are any numbers having no common factorsother than 1. Examples of co-primes are 8 and 9 or 15 and 32.Twin primes are pairs of prime numbers exactly 2 apart such as 11 and 13 or 659 and 661.
Believe it or not, the number of prime numbers beginning with 8 is infinite.
8 has three primes (2x2x2) in its factorization, and 30 is the smallest number having three different primes (2x3x5) in its factorization.
There is only one even prime number (2). There are no 8-digit even primes.
eight (8)
Three of them.
Sol: 24 = 3 x 8, where 3 and 8 are co-primes. The sum of the digits in the given number is 36, which is divisible by 3. So, the given number is divisible by 3. The number formed by the last 3 digits of the given number is 744, which is divisible by 8. So, the given number is divisible by 8. Thus, the given number is divisible by both 3 and 8, where 3 and 8 are co-primes. So, it is divisible by 3 x 8, i.e., 24.
Take your pick: 15 is the only number which is a product of 2 primes (3*5). 63 is the only number that is the products of three odd primes (3*3*7) 8 is the only cube number (22) 50 is the only number that is not one less than a square number (15=42-1, 63 = 82-1, 8 = 32-1).
Number of primes = 4 Number of composites = 5 Ratio of primes to composites = 4 : 5
There are 8 twin primes less than 100. 3,5 : 5,7 : 11,13 : 17,19 : 29,31 : 41,43 : 59,61 : 71,73
16. 8 white and 8 black
the prime numbers between 8 and 24 are 11, 13, 17, 19 and 23 so five
False. Co-primes are not the same as twin primes.Co-primes are any numbers having no common factorsother than 1. Examples of co-primes are 8 and 9 or 15 and 32.Twin primes are pairs of prime numbers exactly 2 apart such as 11 and 13 or 659 and 661.