Laugh and say, I'm not lying.
Naughty said: Xiaoxiao is lying.
Qing Qing said: naughty smiling faces are deceptive.
Clever children, do you know which one of them must be lying?
This year, our Yucai Group has four new young teachers, and our Yucai Group has four primary schools. We will arrange 1 teacher for each primary school. Three related teachers suggested this arrangement:
Miss Li: C goes to primary school and B goes to middle school.
Miss Wang: C goes to the second primary school and D to the third primary school.
Teacher Zhang: A goes to the second primary school and D to the fourth primary school.
The principal of the general school finally absorbed half of the suggestions of the relevant teachers. Do you know how the headmaster divided them?
There are 32 football teams participating in the World Cup. They were divided into eight groups, and the first group match was held. Every two teams in the group will play a game. Do you know how many World Cup group matches have been played?
4. Fold a 12m long rope into three equal lengths, then fold it in half, and then cut it from the middle, then a * * * will be cut into () ropes, and the shortest one is () meters.
The master chased his dog. The dog runs three steps and the owner runs two, but the dog needs to run two steps away from the owner. After the dog ran 10, the owner began to chase. When the owner caught up with the dog, the dog ran out ().
6. If the fish tail weighs 4 kilograms, the weight of the fish head is equal to the weight of the fish tail plus half the weight of the fish body, and the weight of the fish body is equal to the weight of the fish head plus the fish tail. This fish weighs 20 kilograms.
7. The sum of the ages of Xiaohong and Xiaolin is younger than that of Dad this year 16 years old. How old are they four years later?
8. 100 boxes contain cups, and the number of each box is different, and the boxes are not empty, so there must be at least () cups.
9. Fill in the smallest natural number so that the last four digits of the product of 225×525× are all 0.
10, the postal code of a place can be expressed by ABCCDD. It is known that the sum of these six numbers is 8, the sum of A and B is equal to 2 d, and A is the smallest natural number. This postal code is ().