2006-11-10 04:55:16 · 13 answers · asked by aladinsane 4 in Education & Reference ➔ Homework Help
39 can be devided by 3 people. Scary.
But you get the jist of what is a prime and a square from the other posts.
2006-11-10 05:23:39 · answer #1 · answered by anysomeone 3 · 0⤊ 0⤋
A square number (perfect square) means you can take a whole number times itself to get that number.
1*1 = 1
5*5 = 25
9*8 = 81
8*8 = 64 ... so all of those are square numbers
A prime number is a number (other than 1) that can't be divided by anything other than itself and one evenly.
NONE of the square numbers are prime. Neither is any even number (so 34 and 28 are out). Since 21=3*7 and 39=3*13, they aren't prime. That leaves 7, 17, and 47.
1, by the way is normally NOT considered prime, even though several other posters have said it is.
2006-11-10 05:00:29 · answer #2 · answered by dmb 5 · 2⤊ 0⤋
Prime: 7, 17, 47
Square: 1, 25, 81, 64
Niether: 34, 28, 21, 39, 47
prime numbers are numbers that don't have any factors except 1 and itself.
square numbers are numbers that have a factor when it is multiplied by itself is that number. sorry, thats kinda confusing. Example: 7*7=49 49 is the square number
2006-11-10 07:30:43 · answer #3 · answered by Anonymous · 0⤊ 1⤋
I am actually quite disturbed by the wrong answers you are getting for this question.
1,25 81 & 64 are the square numbers. This is because they are the product of like numbers as in the area of a square.
1.e 1=1x1, 25=5x5, 81=9x9 &64=8x8.
Prime numbers are numbers which have only two factors, themselves and 1.
1 is not a prime number because 'itself' is one so it only has one factor!
The smallest prime number and, in fact, the only even number to be prime, is 2 as this has only two factors which are itself(2) & 1.
The prime numbers, therefore, are 7, 17 & 47
2006-11-10 06:01:59 · answer #4 · answered by saljegi 3 · 1⤊ 0⤋
1, 7, 17, 39 and 47 are prime numbers (only divisible by 1 and itself)
25, (5*5), 81 (9*9), 64 (8*8)
34, 28, 21 aren't square or prime.
2006-11-10 05:03:33 · answer #5 · answered by Katya-Zelen 5 · 0⤊ 1⤋
1 25 81 64 are all squares
1 7 17 47 are primes
2006-11-10 04:58:14 · answer #6 · answered by momofmodi 4 · 1⤊ 1⤋
each top of the type 4n+a million is the sum of two squares yet no top of the type 4n+3 could be expressed because of the fact the sum of two squares. This theorem turn into first reported with the help of Fermat and the 1st printed evidence turn into with the help of Euler. this is rather common to instruct using the arithmetic of the Gaussian integers. using this theorem this is common to locate examples of numerous consecutive primes that are no longer the sums of two squares - you only seek for a run wherein all the primes are of the form 4n+3.
2016-12-28 18:01:54 · answer #7 · answered by guillotte 3 · 0⤊ 0⤋
1 Is a prime
25 is 5 squared
34 is neither
81 is 9 squared
64 is 8 squared
21 is neither
39 is neither
47 is a prime
remember a square is x times x
aprime is unique it can only be divided by 1
2006-11-10 05:12:15 · answer #8 · answered by Anonymous · 0⤊ 1⤋
39 is NOT a prime number, but, most other answers are right...
2006-11-10 05:02:54 · answer #9 · answered by Anonymous · 0⤊ 0⤋
1 is not prime nor square
25;81;and 64 are all square
7;34;17;28;21;39; and 47 are prime
2006-11-10 05:22:35 · answer #10 · answered by Anonymous · 0⤊ 1⤋