(2)60=2*2*3*5,84=2*2*3*7?
Only 5 is different from 7, which means that the greatest common divisor of these two numbers is 2*2*3= 12?
The least common multiple of these two numbers is 84- 12=72?
Let these two numbers be 12a and 12b(a, b coprime) respectively.
So 12a+ 12b=60?
a+b=5?
And 5= 1+4=2+3?
1* 12= 12,4* 12=48,2* 12=24,3* 12=36?
After testing, these two numbers are 24 and 36 respectively.
(3) no?
(4) The greatest common divisor refers to the greatest common divisor of some integers * * *?
Example:? Of 2, 4 and 6, 2 is the greatest common divisor of 2, 4 and 6. ?
The least common multiple, for two integers, refers to the minimum multiple of two numbers * * *?
When calculating the minimum common multiple, the maximum common factor is usually used to assist the calculation. ?
The key to this problem lies in the decomposition of 180?
180=3×3×2×2×5? = 12? x? 15?
Guess the greatest common divisor is 3 and the least common multiple is 60.
The two numbers are 12 and 15? , so the larger number is 15?
(5) no?
12? =? 3? x? 4? 15? =? 3? x? five