A question I saw on the Olympiad paper, please help me take a look! 10

Referring to one of the islands asked:"Will the people of that island tell the truth or lie? "

Mine is: Isn't there a fork in the road? They are A and B.

You point to one of the roads and ask the person, "Is this road going to your hometown?" ”

For example. Let's assume that Road A is the way to Mashima.

Then we pointed to the A road and asked the man, "Is this the way to your hometown?" ”

If the person is from the real island, he will answer "yes".

If the person is a fake islander, he will answer "no".

Assuming that Road B is the way to Mashima, the reason is the same as above.

Just ask a man.

Your male and female

No, you can't pull !!

Show him a way:"This isn't going to Majima, is it? "

If it were a man from Majima, he would say:"Not true"

The people of the fake island will say"Right"

You're going the other way!

Someone who asks another island will say whether this island is real or fake.

He: If it's a real island, then it's a fake island, and if it's a fake island, it's a real island.

Pointing to one of the islands, he asked"Are you from that island?"?

Yes"That's Majima.

It's not"That's the false island.

Because no matter which island the people can only do this)

Q: What island is he from? The island he was referring to was the real island. For if he is a man of the true island, the island he is referring to is the true island; If he is a person from a false island, he will not refer to his false island, then the island he is referring to is also a real island.

Substituting x=1 y=2 into the above equation gives a+6b=c 2a-2b=5c b, and c is replaced by a, so c=7 16a b=-3 32a so a:b:c=32:(-3):14

Next question: x=2, y=0

1.Because only the percentile is wrong, then the correct answer can only be between 13 and 13. Then this correct sum is 162;

Then the correct average is 162 13= (keep two decimal places)2Let A be x and B be y.

5/6）x=（1/4）y

y=（10/3）* x

Because A is a positive integer and B is a positive integer, x=3*n (n=1,2,3......So x=3, y=10

If the last number is wrong, then the number must be between to.

13*, 13*, because it is the sum of 13 positive integers, it must still be a positive integer, so it can only be 162

Let A x B y

5x 6=y 4, so y=10x 3, because x and y are both positive integers, so x is minimum 3, so y=10

So x+y is 13 minimum

1) A: 360x2 5=144 kg.

C: (360-144) (1+1+1 4)=216 9 4=96 kg.

B: 216-96 = 120 kg.

2) 18x(1-1 9)=16km.

16 16 = 1 km day.

Day 1 (1+1+1 9)=1 19 9=9 19 kmA Day 1-9 19=10 19 km.

3/4x1/5=3/20

6 (1-1 4-3 20)=6 3 5=10km It should be, choose me.

1. A = 360 * 2 5 = 144

C = (360-144) (1 + 5 4) = 96 B = 360-144-96 = 120

2. B = 18 (1-1 9) (1 + 10 9) 16 = 9 19 (1 9 in 1-1 9 is where the road surface of 1 9 does not need to be repaired, 10 9: Team A repairs 1 9 more than Team B on average every day, that is, A is 10 9 times that of B).

A = 9 19 * 10 9 = 10 19