All the prime numbers less than 20 are 2,3,5,7,11,13,17,19
A prime number can be less than 20, but it is not a requirement that the number has to be under 20 to be considered prime. Here is a list of all the prime numbers under 20: 2, 3, 5, 7, 11, 13, 17, and 19 .
No square number is a prime number, since it has the number you squared as a factor. There are several square numbers less than 100. Just calculate the squares of all numbers, starting with 1, until you reach or pass 100. Then stop.
25 is the number not less than 20, not greater than 40, not divisible by 2 3 or 7, and not a prime number.
1, 2, 3 ,5 , and 7 are all prime numbers less than 10. The lower the number is, the more likely it is to be prime. There is only one number, 2, that is even.
All the prime numbers less than 20 are 2,3,5,7,11,13,17,19
The sum of all prime numbers less than ten is 17. Pick a number 18 or higher.
3, 5, 7, 11, etc. are all prime numbers that are less than 30.
31
There is only one prime number which is even - that is 2 - and it also happens to be less than 100. All other prime numbers are odd.
There is only one even prime number and that is 2 as all over even numbers can be divided by 2 and 2 is not square so there isn't a number less than 100 that is an even prime square number.
25 is the number not less than 20, not greater than 40, not divisible by 2 3 or 7, and not a prime number.
26
1, 2, 3 ,5 , and 7 are all prime numbers less than 10. The lower the number is, the more likely it is to be prime. There is only one number, 2, that is even.
Prime numbers are numbers that are divisible by themselves and 1. 1 itself is not regarded as a prime number. With the exception of 2, all prime numbers are odd numbers. Applying this gives the following prime numbers less than 25 :- 2,3,5,7,11,13,17,19 and 23.
2,3,5,7.2*3*5*7=210
No. 9 is an odd integer less than 10 and you can get it by multiplying 3X3. All odd integers less than 9 are prime. Except one (1). The number 1 is neither prime nor composite.