49 is not prime, as it's 7 * 7.
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∙ 2010-06-03 16:41:1825 is the number not less than 20, not greater than 40, not divisible by 2 3 or 7, and not a prime number.
Its square root is less than 9, but it is not evenly divisible by any number less than 9, other than 1, so it is a prime number
25 is divisible by 5 24 is divisible by 2,3,4,6,8,12 So the answer is 23
85
No.551218171009141211314 is not a prime number.It is divisible by 2 (and 275609085504570605657, of course, but which is also not a prime number!)But ...551218171009141211267 is the prime number nearest belowthe number in the question, and551218171009141211417 is the next higher prime number.So the nearest prime number to 551218171009141211314 is 551218171009141211267, being only 47 less than the given number, whereas 551218171009141211417 is 103 more than the given number.
18
25 is the number not less than 20, not greater than 40, not divisible by 2 3 or 7, and not a prime number.
Its square root is less than 9, but it is not evenly divisible by any number less than 9, other than 1, so it is a prime number
16
25 is divisible by 5 24 is divisible by 2,3,4,6,8,12 So the answer is 23
No.
85
49 is 7 * 7.
Because it is divisible by the prime number 2, which is less than 10.
Prime numbers are such number which are only divisible by 1 and by itself only..{1,2,3,5,7,11,13,17}
No.551218171009141211314 is not a prime number.It is divisible by 2 (and 275609085504570605657, of course, but which is also not a prime number!)But ...551218171009141211267 is the prime number nearest belowthe number in the question, and551218171009141211417 is the next higher prime number.So the nearest prime number to 551218171009141211314 is 551218171009141211267, being only 47 less than the given number, whereas 551218171009141211417 is 103 more than the given number.
Prime numbers, except 2, are always odd (they would not be prime if they were even cos they would be divisible by 2.) 1 less than any odd number must be an even number.