67 and 5
67 and 5
72 = 36 + 36
How about: 8*9 = 72
54 and 72 are divisible by 2,3.
99
67 and 5
2 and 3: 72 = 2 x 2 x 2 x 3 x 3
72 = 36 + 36
How about: 8*9 = 72
54 and 72 are divisible by 2,3.
When the two numbers are coprime. Coprime numbers need not be prime numbers - they must not have any factor in common (other than 1). So, for eaxmple, neither 8 nor 9 are prime numbers but they are coprime and so, LCM(8 , 9) = 72
67 and 5
145
99
The Fundamental Theorem of Arithmetic states that every number has exactly one, unique factorization of potentially non-unique prime numbers. Since the prime factorization of 72 is 2*2*2*3*3, we conclude that 72 is coprime with all other prime numbers, so there is no solution.
Not sure about 720 but if the answer were to be 72 then the two numbers are 8 and 9 8 x 9 = 72 8 + 9 = 17
Split the number in half and make an equation adding the two together to make the desired amount. Unless the number that is half the total is prime, adjust the first number down by an amount to make it a prime number, then adjust the second one up by an equal amount and check whether it is also a prime number. If the second number is also a prime number, you have found two prime numbers that equal the desired amount. If not, adjust the first number down to another prime number, repeating the procedure above until you have two prime numbers.If you split 144 in half, the result is 72. Take the equation 72 + 72 = 144. Since 71 is prime, adjust the first number down by 1 and the second number up by 1 to get 71 + 73 = 144. Since 73 is prime, too, you now have two prime numbers that add up to 144.