Continuing from the discussions we have been having about the “100 lockers” problem. Can you tell me if 1 is a prime number? (and how you have found your answer.)
Mr. Stewart
Powered by FireStatsContinuing from the discussions we have been having about the “100 lockers” problem. Can you tell me if 1 is a prime number? (and how you have found your answer.)
Mr. Stewart
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yes
yes and no cause on some websites it says no and on others it says yes
have had another look and found that no.1 is not a prime number.
no
Well done Sam, Grant and Kieran for posting an answer but remember I would like you to give some explanation of your answer. Why is 1 a Prime, or not a prime. If you have not yet posted your answer, I look forward to reading what you have found out.
The definition of a prime number doesn’t allow 1 to be a prime number: 1 only has one factor, namely 1. Prime numbers have exactly two factors, not “at most two” or anything like that. One is neither a prime number nor a composite number, but a unit.
Hi,
now that the kids have had a go, I thought I might too.
No 1 is not a prime number. Prime numbers have 2 factors themselves and 1. The number 1 has only 1 factor, itself.
Hope I haven’t got this too wrong as I enjoy all these maths teasers.
Thanks
No 1 isnt a prime number because a prime number can be divided by itself and 1, 1 can only be divided by 1 which is itself.
1 isn’t a prime number because a prime number can be divided by one and itself but 1 can only be divided by 1 which is itself.
1 cant be a prime because it only has one factor - itself - whereas 2 has two factors - itself and 1 - a prime number must have two factors no more or less.
1 cannot be a prime number cause when you divide it by itself you do not get an answer and it only has one factor.