Several people take turns to report, and each person is required to report at least 1 natural number and at most 3 natural numbers in the order of natural numbers, such as the first person reporting 1, 2; The first person can report 3, 3, 4 or 3, 4, 5. Whoever reports 100 first wins.

Take out a new deck of playing cards, and the dealer will carefully wash the playing cards first, so that all the playing cards will bloom, so that there are no rules to follow. Then give it to several or several people to watch the memory and start the watch in time. They are not allowed to ventilate each other. Finally, give those people or people a deck of playing cards, and let them rearrange the remembered playing cards according to their memory to see who put the playing cards. Whoever plays cards in the same order as the original mother, whoever has the most cards will win.