Giulio Zambon's Website
Puzzles - 30-Second Challenge

The puzzle "30-Second Challenge" appears on several newspapers in the UK. Here is one of the puzzles I have generated:

30 Seconds

The idea is simple: you have thirty seconds to solve the operations and arrive to a result. Each partial result is the starting value for the next operations. For example: 26 x 2 = 52. Therefore, you write 52 in the empty space beside "Multiply by 2". Then, you write 51 beside "Subtract 1", 17 beside "One third of it", and so on. The difficulty of the puzzle increases from left to right (i.e., from green to red).

If you would like to include this puzzle in any publication, don't hesitate to contact me at the email address that you find on the home page. I can modify the format to suit your needs.