Three people go to the hotel, 10 yuan per person, a total of 30, today only 25 yuan to find 5 yuan, the waiter greedy 2 yuan is equivalent to 9 yuan per person, 3 times 9 class 27, plus 2 class 29, where is the 1 yuan

Three people go to the hotel, 10 yuan per person, a total of 30, today only 25 yuan to find 5 yuan, the waiter greedy 2 yuan is equivalent to 9 yuan per person, 3 times 9 class 27, plus 2 class 29, where is the 1 yuan

3 times 9, waiting for 27, which includes the 2 yuan that the waiter is greedy for, so we shouldn't add 2 yuan. Each of the three paid 9 yuan, and each of them had 1 yuan left

The greatest common factor and the least common multiple of 80 and 100
The math problem is a bit difficult

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How can it be divided here
The greatest common factor of 80 and 100 is 20,
The least common multiple is 400,
Choose me

What are the greatest common factor and the least common multiple of 5, 80 and 8?
As long as you get the number, don't count the formula, but cry for it

The greatest common factor is 1 and the least common multiple is 80