I mixed 2 bedrooms, 2 toilets, 1 kitchen key for a total of 5 up to a few

Look, there's a separate one in the kitchen. The other four are not the same in pairs, take one and try it, don't you know everything?

Question 1: 1*5+1*4+1*3+1*2+1*1=15

Question 2: 3*1=3

These questions are not difficult, and you have to use your own brain for homework.

Hehe, simulation, playing, three times rock--- scissors--- paper--- stone, loop.

Summary. I mixed two bedrooms, two toilets, and five keys to the kitchen. At most, several times can be fully divided out to do more than 10 times can be corresponding, the first key to open 4 times has not been opened, then he and the fifth lock is corresponding, the same, 4 3 2 1 = 10

I mixed two bedrooms, two toilets, and five keys to the kitchen. At most, it can be fully divided several times.

I mixed two bedrooms, two toilets, and five keys to the kitchen. At most, a few times can be fully divided out to do more than 10 times can be a pair of cave sources to meet and talk, the first key to open 4 times has not been opened, and the crack is corresponding to the fifth lock, the same way, 4 3 2 1 = 10

The first key, 5 locks, up to 4 trials; The second key is only 4 locks, and the envy socks can be tried out up to 3 times; The third key is only 3 locks, and the cover is old for up to 2 times; The fourth key has only 2 locks, and it can be tried out at most 1 time; The first brother is excited, five keys and one lock, and there is no need to try. So, 4+3+2+1 10 (times).

Summary. Hello dear, I am very honored to be able to ask you for your question, as long as you make a mark, you can divide the keys to two bedrooms, two toilets, and a kitchen at one time, which is to mark the keys and write the order of which room respectively.

I mixed two bedrooms, two toilets, and five keys to the kitchen. At most, it can be fully divided several times.

Hello dear, it is a great honor to be able to return to the Chang chain problem, as long as you make a mark, you can divide the two bedrooms, two toilets, and a kitchen leak Sun Xunnian key out, that is, make a mark on the key, and write the order of which room respectively.

Find 3rd grade arithmetic problems.

Hello dear, the arithmetic problem is, 2+1-2 1