Page 75 - NUMINO Challenge_A2
P. 75
Creative Thinking
1 Anna and Dan arranged stones at regular intervals in straight lines.
Anna arranged 8 stones that were 5 cm apart, and Dan arranged 13
stones that were 3 cm apart. Whose line is longer? The thickness of the
stones does not count.
Key Point
The number of intervals
between two adjacents
stones is 1 less than the
number of stones.
2 Tom wants to hang five small pictures, each of which is 10 cm wide, on
a wall that is 80 cm wide. He wants the interval between the edges of
the wall and the pictures on both ends and the interval between every
two adjacents pictures to be the same. At what distance should the
pictures be placed apart?
10 cm 80 cm
72 NUMINO Challenge A2 Key Point
Think about how many
intervals there are when
five pictures are placed on
the wall.
1 Anna and Dan arranged stones at regular intervals in straight lines.
Anna arranged 8 stones that were 5 cm apart, and Dan arranged 13
stones that were 3 cm apart. Whose line is longer? The thickness of the
stones does not count.
Key Point
The number of intervals
between two adjacents
stones is 1 less than the
number of stones.
2 Tom wants to hang five small pictures, each of which is 10 cm wide, on
a wall that is 80 cm wide. He wants the interval between the edges of
the wall and the pictures on both ends and the interval between every
two adjacents pictures to be the same. At what distance should the
pictures be placed apart?
10 cm 80 cm
72 NUMINO Challenge A2 Key Point
Think about how many
intervals there are when
five pictures are placed on
the wall.
