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Puzzle 553
Start in square 'S' and end in square 'E' moving either horizontally or vertically in each move. Start by moving 2 squares in each of your moves, but when you land on a '*' square, change the number of squares you move from 2 to 3, or vice versa. You can not step on or pass through the black squares, and you have only 8 moves in which to complete this task.
Puzzle Copyright © Cihan Altay
Puzzle 554
The Winter Festival is well underway and BrainBashers control is working out the plane times for the return journeys.
Unfortunately, the BrainBashers timetable software is playing up again and has worked out the times incorrectly, as shown below.
France 4.00pm
Mexico 3.00pm
Jamaica 5.00pm
Japan 1.00pm
According to the software, at what time is the return trip to Finland?
Puzzle 555
The river Pregel ran through the town of Konigsberg. In the river were two islands, connected to each other and the rest of the city by seven bridges.
The residents of Konigsberg challenged each other to walk through the city, and cross each of the seven bridges exactly once.
Can you find a path that they might have taken?
This is the 'Seven Bridges of Konigsberg' puzzle, tackled by Leonhard Euler in 1736.
Puzzle 556
What comes next in this sequence:
31 · 41 · 51 · 61 · 71 · 81 · 92 · ?