Is 121 a prime number?

2008-04-05 4:22 pm
if not explain why and simple cuz im only in 5th grade

回答 (12)

2008-04-05 4:24 pm
✔ 最佳答案
no, 11 times 11 is 121
so its a perfect square
2008-04-05 6:41 pm
11 x 11 = 121 so 121 IS NOT prime.
11 is a factor of 121
121 can be divided by 11.
A prime number can ONLY be divided by itself and 1.

Some prime numbers are 2 , 3 , 5 , 7 , 11 , 13 , 17, 19 , 23 , 29--------
2008-04-05 4:28 pm
nope 'cause a prime number is one which can only divide by itself and 1, like 2(divided by 1 =2 and divided by 2=1, can't be divided by anything else)
121 can be divided by 11=11 so it is not a prime number, hope it helps:D
參考: my own knowledge:D
2016-03-13 10:20 pm
composite = having other factors other than 1 and itself 11*11 is 121 so its factors r 1, 11, 121 therefore, it's composite
2015-08-20 11:26 pm
This Site Might Help You.

RE:
Is 121 a prime number?
if not explain why and simple cuz im only in 5th grade
參考: 121 prime number: https://bitly.im/Td1lJ
2008-04-05 5:23 pm
No,because 121 = 11^2 (11 x 11)
2008-04-05 4:56 pm
no, it is divisble by 1, 11, 121
2008-04-05 4:52 pm
no, it can be divided by 11. A prime number means it can only be divided by 1 while 121 is not
2008-04-05 4:30 pm
No. It has a factor of 11. 11*11=121.
121 is a square number.
2008-04-05 4:25 pm
No, because 121 = 11 x 11. If it was prime, you wouldn't be able to write it as two numbers multiplied together. For example, 17 is prime because you can't write it as two numbers multiplied together.


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