Page 167 - NUMINO Challenge_C2
P. 167
Answer
Key
5 Let A, B, and C represent the three loaves of Creative Thinking p.135~p.136
bread. The quickest way to bake the three
loaves is as shown below. 1 When you drink 6 bottles of soda and trade in
A Front A Back B Back empty bottles, you can get 2 free bottles. Since
Oven you cannot exchange 2 empty bottles, you can
get 8 bottles of soda.
B Front C Front C Back
2 The snails crawls up 50 cm during the day and
44 4
Minutes Minutes Minutes slips down 10 cm every night; therefore, the snail
It will take at least 4 4 4 12 minutes.
moves up 40 cm each day. Since the tree is 5 m
high, the snail crawls up 4 m on the 10th night, 4
Problem solving m and 40 cm on the 11th night, 4 m and 90 cm on
the 12th day, 4 m and 80 cm on the same night.
1 Let A, B, and C represent the three eggs. The Then, it arrives at the top of the tree on the 13th
quickest way to fry the three eggs is as shown day.
below.
1st Day 2nd Day 12th Day 13th Day
2 21
Minutes Minutes Minute (50 10) (50 10) (50 10) 20 500
Therefore, it will take the snail 13 days to reach
the top of the tree.
Frying A CC
Pan B A B 3
Therefore, it will take at least 2 2 1 5 minutes.
2 Let A, B, C, D, E and F represent the six cookies. 4 Since the dog and the chicken, and the chicken
The quickest way to bake the six cookies is as and the corn cannot be left together, the farmer
shown below.
can cross the river first with the chicken.
AAC
BBD Dog, Chicken, Corn Chicken Chicken
Dog, Corn Dog Dog
Oven Corn Dog
Corn Chicken Dog, Corn
CEE Chicken Corn Dog, Chicken, Corn
DF F
Chicken
1 11
Minute Minute Minute
Therefore, it will take at least 1 1 1 3 minutes.
NUMINO Challenge C2
Key
5 Let A, B, and C represent the three loaves of Creative Thinking p.135~p.136
bread. The quickest way to bake the three
loaves is as shown below. 1 When you drink 6 bottles of soda and trade in
A Front A Back B Back empty bottles, you can get 2 free bottles. Since
Oven you cannot exchange 2 empty bottles, you can
get 8 bottles of soda.
B Front C Front C Back
2 The snails crawls up 50 cm during the day and
44 4
Minutes Minutes Minutes slips down 10 cm every night; therefore, the snail
It will take at least 4 4 4 12 minutes.
moves up 40 cm each day. Since the tree is 5 m
high, the snail crawls up 4 m on the 10th night, 4
Problem solving m and 40 cm on the 11th night, 4 m and 90 cm on
the 12th day, 4 m and 80 cm on the same night.
1 Let A, B, and C represent the three eggs. The Then, it arrives at the top of the tree on the 13th
quickest way to fry the three eggs is as shown day.
below.
1st Day 2nd Day 12th Day 13th Day
2 21
Minutes Minutes Minute (50 10) (50 10) (50 10) 20 500
Therefore, it will take the snail 13 days to reach
the top of the tree.
Frying A CC
Pan B A B 3
Therefore, it will take at least 2 2 1 5 minutes.
2 Let A, B, C, D, E and F represent the six cookies. 4 Since the dog and the chicken, and the chicken
The quickest way to bake the six cookies is as and the corn cannot be left together, the farmer
shown below.
can cross the river first with the chicken.
AAC
BBD Dog, Chicken, Corn Chicken Chicken
Dog, Corn Dog Dog
Oven Corn Dog
Corn Chicken Dog, Corn
CEE Chicken Corn Dog, Chicken, Corn
DF F
Chicken
1 11
Minute Minute Minute
Therefore, it will take at least 1 1 1 3 minutes.
NUMINO Challenge C2
