These numbers between 1 and 40 have an odd number of factors: 4, 9, 16, 25, 36.
23, 25, 27, 29
All the numbers above 2 that are the squares of odd primes have exactly 3 factors: 1, the odd prime, and the odd prime squared. 4, 9, 25, 49, 81, 121,...
The odd composite numbers lower than 30 are:9 15 21 25 27
There are thirteen (13) odd numbers between 14 and 40. They are: 15 17 19 21 23 25 27 29 31 33 35 37 39
There are 25 of them.
odd numbers between 25 and 45 inclusive are 25 27 29 31 33 35 37 39 41 43 45
'25' is odd, all right, but not prime. (It can be divided by 1, 5, and 25) By the way, prime numbers must be odd numbers. All even numbers can be divided by 2, at least, and are therefore not prime.
yes 9 25 49 81 121 All odd numbers squared are odd numbers
25
no, 25 is odd and is not prime 25 = 5 x 5 There is only one even prime number:2, all other prime numbers are odd, but all odd numbers are not prime number
These two odd numbers are 39 and 65. Both are between 25 and 75, and their GCF is 13.
These numbers between 1 and 40 have an odd number of factors: 4, 9, 16, 25, 36.
The sum of the even numbers is (26 + 28 + ... + 100); The sum of the odd numbers is (25 + 27 + ... + 99) Their difference is: (26 + 28 + ... + 100) - (25 + 27 + ... + 99) = (26 - 25) + (28 - 27) + ... + (100 - 99) = 1 + 1 + ... + 1 There are (100 - 26) ÷ 2 + 1 = 38 terms above which are all 1; their sum is 38 x 1 = 38. So the difference of the sum of all even numbers and all odd numbers 25-100 is 38.
All odd numbers are the sum of two consecutive numbers. Odd multiples of 7 less than 25 are 7 and 21.
23, 25, 27, 29
They are: 19 21 23 and 25