Page 48 - NUMINO Challenge_C1
P. 48
Problem solving Key Points
1 Two players take turns drawing straight lines to Use the principles of
connect numbers on a clock face. Each player symmetry.
draws one line per turn, and the player who can
no longer draw lines loses. Who will always win:
the first or the second player? Note that the lines
cannot meet in the circle.
11 12 1 11 12 1
10 2 10 2
93 93
84 84
7 65 7 65
2 Two players take turns placing one tile (shaped Find the point of
like the one in the box) at a time on the game symmetry.
board. The tiles cannot overlap. The player who
places the last tile wins. Explain the winning
strategy of this game.
Puzzles 45
1 Two players take turns drawing straight lines to Use the principles of
connect numbers on a clock face. Each player symmetry.
draws one line per turn, and the player who can
no longer draw lines loses. Who will always win:
the first or the second player? Note that the lines
cannot meet in the circle.
11 12 1 11 12 1
10 2 10 2
93 93
84 84
7 65 7 65
2 Two players take turns placing one tile (shaped Find the point of
like the one in the box) at a time on the game symmetry.
board. The tiles cannot overlap. The player who
places the last tile wins. Explain the winning
strategy of this game.
Puzzles 45
