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What is the probability of getting a prime number between 10 and 30?
From 10 to 30, there are 21 numbers.Six of them are prime numbers: 11, 13, 17, 19, 23, and 29.If you pick a number at random from 10 to 30, the probabilitythat it's a prime number is6/21 = 2/7 = 28.57% (rounded)
Which number is prime 9 19 21 25?
3 x 3 = 9 (Not a prime ; Composite) 1 x 19 = 19 ( Prime) 3 x 7 = 21 (Note a prime: Composite) 5 x 5 = 25 (Not a prime ; Composite).
What odd number between 11 and 21 is the product of two prime numbers?
13 is prime so it is not the number. 15 is the product of 3 and 5, two prime numbers, so it fits the conditions. 17 is prime so it is not the number. 19 is prime so it is not the number. 15 is the only odd number between 11 and 21 that fits the conditions. However, if 21 is included in the range, it also is the product of two prime numbers: 3 x 7.
What do you get if you the numbers 1 to 12 into six pairs so that the sum of each pair is a prime number and all prime numbers are different?
1+2...+12=78 6 Prime Number combinations that make 78. Constraints: x>=3 x<=23 x=/=x 3+7+11+17+19+21=78 Test: 1+2=3 3+4=7 5+6=11 7+10=17 11+8=19 9+12=21 You get: 3, 7, 11, 17, 19, and 21.
Is 13 15 17 19 21 23 25 27 29 prime numbers?
They are all prime numbers except for 15 21 25 and 27 which are composite numbers
Are 17 and 21 prime numbers?
17 is a prime number, but 21 is not (21 = 3 * 7).
Which is a prime number 16 21 19 18?
19 is prime.
Is 23 21 19 prime or composite?
19 is a prime number. Its only factors are 1 and 19. 21 is a composite number. Its factors are 1, 3, 7, and 21. 23 is a prime number. Its only factors are 1 and 23.
Which one is a prime number 19 21 or 23?
19 and 23 are prime.
Prime number between 1-20?
21
What are the prime numbers between 10 and 21?
The prime numbers between 10 and 21 are 11, 13, 17, and 19.
Is 15 17 19 21 23 25 27 29 and 31 prime or composite?
17, 19, 23, 29 and 31 are prime. 15, 21, 25 and 27 are composite..
What is the prime number of 16 27 13 19 21?
They are 13 and 19 which are prime numbers
What is a not a prime 17 21 29 37?
21 is not a prime number because it is 3 x 7
How many prime numbers are between 10 and 21?
Four. The prime numbers between 10 and 21 are 11, 13, 17, and 19.
What is the largest prime number less than 21?
19
What is the probability of getting a prime number between 10 and 30?
From 10 to 30, there are 21 numbers.Six of them are prime numbers: 11, 13, 17, 19, 23, and 29.If you pick a number at random from 10 to 30, the probabilitythat it's a prime number is6/21 = 2/7 = 28.57% (rounded)
