Page 50 - NUMINO Challenge_B1
P. 50
Problem solving Key Points
1 Two players take turns saying numbers. The How many numbers
player who says 23 wins. The first player smaller than 23
chooses a number that is less than 5. On the does the player
next turn, each player adds a number that is less have to continually
than 5 to the opponent's number. What number say in order to say
should the first player say first in order to win? 23?
2 Two players take turns saying numbers. The What are the most
player who says 100 wins. The first player can and the least
say at most five consecutive numbers, starting numbers that can be
from 1. On the next turn, each player can say at said?
most five consecutive numbers, starting with the
opponent’s last number of the previous turn. If at
least one number must be said on each turn,
how many numbers should the first player say in
order to win?
47Puzzles and Games
1 Two players take turns saying numbers. The How many numbers
player who says 23 wins. The first player smaller than 23
chooses a number that is less than 5. On the does the player
next turn, each player adds a number that is less have to continually
than 5 to the opponent's number. What number say in order to say
should the first player say first in order to win? 23?
2 Two players take turns saying numbers. The What are the most
player who says 100 wins. The first player can and the least
say at most five consecutive numbers, starting numbers that can be
from 1. On the next turn, each player can say at said?
most five consecutive numbers, starting with the
opponent’s last number of the previous turn. If at
least one number must be said on each turn,
how many numbers should the first player say in
order to win?
47Puzzles and Games
