write all prime number and composite number less than 50
Answers
A composite number is a whole number that is greater than one and has more than two factors. The number 1 is neither prime nor composite. ... The prime numbers less than 50: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47.
Prime numbers are defined to be numbers that do not have any other divisors besides 1 and itself. Only the number one (unity) has one divisor and that is 1. 1 is not classed as a prime by convention because many of the rules which hold true for all other primes are invalid when applied to unity.
The total number of prime numbers less than 50 are 15 and are enumerated below.
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47
They are obtained by writing down all the integers from 1 to 50 and then strike off those numbers which are even and odd. What remain are your prime numbers. We start from 2 since by convention 1 is not counted as a prime.
2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50
Now, you strike off 4,6,8,9,10,12,14,16,,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,46,48,49,50
and we are left with a string of 15 prime numbers which are given earlier.
Explanation:
Between
1
and
50
, we have following numbers as composite.
{
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
}
Total
33
composite numbers.