Page 58 - NUMINO Challenge_D2
P. 58
Problem solving Key Points
1 There are 200 female students in Jessica’s When the problem is
school. Among them, 80 students have older represented by a
sisters, and 140 students have older brothers. If Venn diagram, C
30 students have both sisters and brothers, how represents the
many female students in Jessica’s school do not number of students
have any older sisters or brothers? who do not have
any older sisters or
brothers.
Total(200)
Older Older
sister brother
(80) (140)
A 30 B
C
C 200 (A 30 B)
2 Two rectangular-shaped tiles overlap on the floor as Consider the square
in the center, which
shown below. What is the area of the floor covered shows the overlapping
by the two tiles in cm2? part of the two tiles.
10 cm
8 cm
2 cm
2 cm
7 cm
5 cm
55Reasoning
1 There are 200 female students in Jessica’s When the problem is
school. Among them, 80 students have older represented by a
sisters, and 140 students have older brothers. If Venn diagram, C
30 students have both sisters and brothers, how represents the
many female students in Jessica’s school do not number of students
have any older sisters or brothers? who do not have
any older sisters or
brothers.
Total(200)
Older Older
sister brother
(80) (140)
A 30 B
C
C 200 (A 30 B)
2 Two rectangular-shaped tiles overlap on the floor as Consider the square
in the center, which
shown below. What is the area of the floor covered shows the overlapping
by the two tiles in cm2? part of the two tiles.
10 cm
8 cm
2 cm
2 cm
7 cm
5 cm
55Reasoning
