Page 109 - NUMINO Challenge_A1
P. 109
Answer
Key
Type Study Opening a Lock
1 The number on the green button is either 6 or 7 since it must be greater than 5.
The number on the yellow button is either 5 or 7 since it must be an odd number.
2 Fill in the blanks according to the conditions.
2
5
7
6
2
7
5
2
75
6
3 652 657 672
675 752 756
Problem solving
1 Since you need to make an even number, 1 cannot be in the ones place and 0 cannot be in
the hundreds place.
18
0
81
108
Three numbers can be made.
2 Find the numbers that meet the conditions.
It must be smaller than 700. 6 ,1
The tens digit must be an odd number. 1
Numbers that meet the conditions are 610 and 618.
4 NUMINO Challenge A1
Key
Type Study Opening a Lock
1 The number on the green button is either 6 or 7 since it must be greater than 5.
The number on the yellow button is either 5 or 7 since it must be an odd number.
2 Fill in the blanks according to the conditions.
2
5
7
6
2
7
5
2
75
6
3 652 657 672
675 752 756
Problem solving
1 Since you need to make an even number, 1 cannot be in the ones place and 0 cannot be in
the hundreds place.
18
0
81
108
Three numbers can be made.
2 Find the numbers that meet the conditions.
It must be smaller than 700. 6 ,1
The tens digit must be an odd number. 1
Numbers that meet the conditions are 610 and 618.
4 NUMINO Challenge A1
