Problems

Age
Difficulty
Found: 2

Jack believes that he can place 99 integers in a circle such that for each pair of neighbours the ratio between the larger and smaller number is a prime. Can he be right?

Katie and Charlotte had 4 sheets of paper. They cut some of the sheets into 4 pieces. They then cut some of the newly obtained papersheets also into 4 pieces. They did this several more times, cutting a piece of paper into 4. In the end they counted the number of sheets. Could this number be 2024?