AnswersDriveThe prime numbers between 20 and 30 is 23 , 29.
Regarding this, how many composite numbers are between 30 and 40?
20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40.
How many prime numbers are between 20 and 50?
There are 7 prime numbers: 23, 29, 31, 37, 41, 43, 47.
1
What are the two prime numbers between 50 and 60?
Name the prime numbers between 50 and 60: [53 and 59] Note that neither 51 nor 57 is prime because they are both divisible by 3. We know that because the sum of their digits (6 and 12) are divisible by 3.
2
Which number is the only even prime?
The only even prime number is 2. All other even numbers can be divided by 2. If the sum of a number's digits is a multiple of 3, that number can be divided by 3. No prime number greater than 5 ends in a 5.
3
What is the mean of prime numbers between 20 and 30?
The prime numbers between 20 and 30 is 23 , 29. Mean of 23 and 29 = ( 23 + 29) / 2. = 52 / 2. = 26.
4
Why is the number 2 the only even prime?
Two is a prime because it is divisible by only two and one. All the other even numbers are not prime because they are all divisible by two. That leaves only the odd numbers.
5
How many prime numbers are between 20 and 50?
There are 7 prime numbers: 23, 29, 31, 37, 41, 43, 47.
6
How many prime numbers are between 40 and 60?
Explanation: A prime number is a number that is only divisible by 1 and the number itself (examples include 3, 11, 19). The prime numbers between 40 and 60 are 41, 43, 47, 53, and 59.
7
What are the prime numbers that are less than 20?
Answer and Explanation: The prime numbers that are less than 20 are: 1, 2, 3, 5, 7, 11, 13, 17, and 19.
8
What are the prime numbers between 20 and 40?
There are four prime numbers between 20 and 40 and they are 23, 29, 31, 37.
9
What are all of the prime numbers between 30 and 50?
There are 5. Just like that. If you need all the prime numbers from 1 to 100, well then here goes: 1,2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,51,53,59,61,67,71,73,79,83,89,91,97.
10
How many composite numbers are there between 20 and 30?
The composite numbers up to 150 are 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98,
11
Why is 15 not a prime number?
For 15, the answer is: No, 15 is not a prime number. The list of all positive divisors (i.e., the list of all integers that divide 15) is as follows: 1, 3, 5, 15. To be 15 a prime number, it would have been required that 15 has only two divisors, i.e., itself and 1.
12
How many prime numbers are between 30 and 40?
Answer and Explanation: The prime numbers between 30 and 40 are: 31 and 37. To find this answer, you start with listing the factors of all numbers between 30 and 40. By looking at this chart, you can tell that there are two prime numbers, because 31 and 37 only have two factors.
13
What is the prime numbers from 1 to 20?
When a number has more than two factors it is called a composite number. Here are the first few prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, etc.
14
What are all the prime numbers between 10 and 20?
Answer: The numbers 11 , 13 , 17 and 19 are all prime numbers between 10 and 20 .
15
What are the prime factors of 20?
20 is a composite number. 20 = 1 x 20, 2 x 10, or 4 x 5. Factors of 20: 1, 2, 4, 5, 10, 20. Prime factorization: 20 = 2 x 2 x 5, which can also be written 20 = 2² x 5.
16
Which is a prime number?
A prime number is a whole number greater than 1 whose only factors are 1 and itself. A factor is a whole numbers that can be divided evenly into another number. The first few prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29. Numbers that have more than two factors are called composite numbers.
17
How many thirds are there in five?
We can connect this to the algorithm for dividing fractions: and we can see that there are 2 wholes with 3 thirds in each whole, so there are thirds in . Because we want to know how many two-thirds there are, we have to make groups of thirds, or divide the number of thirds we have by . So there are two-thirds in 2.
18
What are the prime factors of 42?
The only way to write 42 as the product of primes (except to change the order of the factors) is 2 × 3 × 7. We call 2 × 3 × 7 the prime factorization of 42. It turns out that every counting number (natural number) has a unique prime factorization, different from any other counting number.