Composite Numbers

Sieves of Eratosthenes is a good way to understand why:

For example:

Write down all numbers from 1 to 100

2 is prime, so all its multiple are composite, all even numbers except 2 are composite, so erase them. Half of the numbers are already erased

3 is prime, so all its multiple are composite, so erase them. A bit less than one third of the remaining number are erased (multiples of 6 have already been erased)

5 is prime, so all its multiple are composite, so erase them....

and so on with 7 and 11....

Each time a prime number is found all its multiples are to be erased from the list.

Thus there are more composite numbers (erased ones) than primes.

composite

prime numbers.

composite tray set up

The they are.

It is: 3.05

2 x 2 = 4

2 x 3 = 6

2 x 2 x 2 = 8

3 x 3 = 9

2 x 5 = 10

2 x 2 x 3 = 12

2 x 7 = 14

3 x 5 = 15

2 x 2 x 2 x 2 = 16

2 x 3 x 3 = 18

2 x 2 x 5 = 20

3 x 7 = 21

2 x 11 = 22

2 x 2 x 2 x 3 = 24

5 x 5 = 25

2 x 13 = 26

3 x 3 x 3 = 27

2 x 2 x 7 = 28

2 x 3 x 5 = 30

2 x 2 x 2 x 2 x 2 = 32

3 x 11 = 33

2 x 17 = 34

5 x 7 = 35

2 x 2 x 3 x 3 = 36

2 x 19 = 38

3 x 13 = 39

2 x 2 x 2 x 5 = 40

2 x 3 x 7 = 42

2 x 2 x 11 = 44

3 x 3 x 5 = 45

2 x 23 = 46

2 x 2 x 2 x 2 x 3 = 48

7 x 7 = 49

2 x 5 x 5 = 50

3 x 17 = 51

2 x 2 x 13 = 52

2 x 3 x 3 x 3 = 54

5 x 11 = 55

2 x 2 x 2 x 7 = 56

3 x 19 = 57

2 x 29 = 58

2 x 2 x 3 x 5 = 60

2 x 31 = 62

3 x 3 x 7 = 63

2 x 2 x 2 x 2 x 2 x 2 = 64

5 x 13 = 65

2 x 3 x 11 = 66

2 x 2 x 17 = 68

3 x 23 = 69

2 x 5 x 7 = 70

2 x 2 x 2 x 3 x 3 = 72

2 x 37 = 74

3 x 5 x 5 = 75

2 x 2 x 19 = 76

7 x 11 = 77

2 x 3 x 13 = 78

2 x 2 x 2 x 2 x 5 = 80

3 x 3 x 3 x 3 = 81

2 x 41 = 82

2 x 2 x 3 x 7 = 84

5 x 17 = 85

2 x 43 = 86

3 x 29 = 87

2 x 2 x 2 x 11 = 88

2 x 3 x 3 x 5 = 90

7 x 13 = 91

2 x 2 x 23 = 92

3 x 31 = 93

2 x 47 = 94

5 x 19 = 95

2 x 2 x 2 x 2 x 2 x 3 = 96

2 x 7 x 7 = 98

3 x 3 x 11 = 99

2 x 2 x 5 x 5 = 100

2540, 1600

Times the numbers starting from 7

Hope this helped :)

11 is a prime

All of them except 23 and 29 which are prime numbers having only two factors

Both are composite.

A composite food is a dish that is made up of multiple ingredients combined to create a single meal or snack. These foods often include a variety of components, such as proteins, vegetables, grains, and sauces, which can enhance flavor and nutritional value. Examples include casseroles, pizzas, and sandwiches. Composite foods are popular for their versatility and convenience, allowing for diverse flavors and textures in one serving.

The composite factors of 42 are: 6, 14, 21, 42.

Loop through each array element; if it is even, print it out. The details, of course, will vary depending on the language; so I give it to you here in pseudocode:

for i = 1 to (size of myArray)

{

if myArray(i) % 2 = 0

print myArray(i)

}

A syntax similar to "number % 2" is used in many languages to get the remainder of a division by zero. This lets you check whether the number is even (if the remainder is zero) or not.

Yes.

SMT renuka bishnoi

Composite numbers thirty and under include 4 6 8 9 10 12 14 15 16 18 20 21 22 24 25 26 27 28 30

The opposite of a prime number is a composite number.

12

No. That's most of the factors of 18, missing three and six.

Yes, it is a multiple of 3.

They are the numbers that have more than two factors whereas prime numbers have only two factors and that 1 is not considered to be a composite or a prime number

40 = 四十

201 is a composite number because it has more than two factors.

If the digits of a number add up to a multiple of three, then the number itself is a multiple of 3. 2+0+1=3, so 201 is divisible by 3 and therefore composite.