5 + 2 = 7
25 and 18 are a factor pair of 450 whose sum is 43.
15 x 11
It is not possible to express something as a sum of whole numbers with no common factor. All whole numbers have at least 1 as a common factor.
1260 630,2 315,2,2 105,3,2,2 35,3,3,2,2 7,5,3,3,2,2
(5 x 6) + (9 x 6) = 14 x 6 = 84
The factors from greatest to least are: 11,11,5,3,3. The smallest prime factor is 3. You can get a quick idea of this by the fact that the digital root (number that goes evenly into the sum off all digits) is 18 which is divisible by 3.
Answer: 276
The smallest prime number that is a factor of the sum of 32009 and 52009 is: 2
Prime numbers only have one prime factor. The factors of 11 are 1 and 11 but only 11 is considered prime. One is the other factor and it is neither prime nor composite. The only prime number with a prime factor that totals 11 is 11.
158 is the sum of the greatest and smallest prime numbers between 60 and 97.
The sum of the three greatest prime numbers that are less than 39 is 97.
In the interval [10,100] the lowest prime number is 11. The highest prime number is 97. 11 + 97 = 108.
45 and 10
36 and 60.
12(6 + 5)
20 and 24
greatest common factor the tree way:ex:25&30 25 30 ^ ^ 5x5 5x6 5x5 are prime numbers so leave it. 5x ^ 5x2x3 2x3=6 then line them up like this:25:5x5 30:5x2x3 then make sum matches.5 and 5 are the only matches so the greatest common factors are 5