Page 169 - NUMINO Challenge_B1
P. 169
Answer
Key
Creative Thinking p.126~p.127 15 Broken Clock p.128~p.129
1 The lengths between the marks are 2cm, 3cm, Example 2, 13, 15 11, 9, 7, pm
and 3cm. Therefore, the measurable lengths are Example
2 cm, 3 cm, 2 3 5 cm, 3 3 6 cm, and
2 3 3 8 cm. Today After After After After After
a day 2 days 3 days 4 days 5 days
2 Place weights on the balance to measure the
Actual 12:00 12:00 12:00 12:00 12:00 12:00
difference of the weights on both sides. For Time pm pm pm pm pm pm
example, 4g can be measured as shown below. 12:10 12:20 12:30 12:40 12:50
pm pm pm pm pm
2g4g 6g TimFaeston 12:00
6 2 4g the Broken pm 10 20 30 40 50
Clock
Difference 0
(minutes.)
1 g 3 2 1 g, 4 g 6 2 4 g, 12 12, 720, 72, 12
5 g 2 3 5 g, 7 g 6 3 2 7 g,
8 g 2 6 8 g, 9 g 3 6 9 g, TryItAgain The clock needs to run 12 hours ( 720
11 g 2 3 6 11 g minutes) faster than the actual time to tell
2 g, 3 g, 6 g (weights already given) the correct time. So it would take 720 4
180 days for the clock to tell the correct
Therefore, the measurable weights are 1 g, 2 g, time. Therefore, it will tell the correct time
3 g, 4 g, 5 g, 6 g, 7 g, 8 g, 9 g and 11 g. after 180 days, at 12 pm.
3 Use the 1 cm and 3 cm strips to measure lengths Type 15-1 Just in Time p.130~p.131
from 1 cm to 4 cm. Use the remaining 6 cm strip 1 The shuttle bus leaves every 20 and 40 minutes,
to measure all lengths from 5 cm to 10 cm. and it takes about 1 hour and 10 minutes to get
1 1, 2 3 1, 3 3, 4 3 1, 5 6 1, 6 6, to Magic Land. Given that Sarah will leave home
7 6 1, 8 6 3 1, 9 6 3, 10 6 3 1. at 11 am, all possible answers are shown below.
1 cm, 3 cm, 6 cm Time to Take the Bus Time to Arrive at Magic Land
4 Amount of Juice (L) 12 : 40 1 : 50
Steps 8-L 5-L 3-L 12 : 20 1 : 30
Container Container Container 11 : 40 12 : 50
Start 8 0 0 11 : 20 12 : 30
350
323 2 Time to Meet Time to Take Time to Arrive
620 at the Bus Stop the Bus at Magic Land
602
152 12 : 30 12 : 40 1 : 50
143 12 : 10 12 : 20 1 : 30
440 11 : 30 11 : 40 12 : 50
11 : 10 11 : 20 12 : 30
Answers will vary.
NUMINO Challenge B1
Key
Creative Thinking p.126~p.127 15 Broken Clock p.128~p.129
1 The lengths between the marks are 2cm, 3cm, Example 2, 13, 15 11, 9, 7, pm
and 3cm. Therefore, the measurable lengths are Example
2 cm, 3 cm, 2 3 5 cm, 3 3 6 cm, and
2 3 3 8 cm. Today After After After After After
a day 2 days 3 days 4 days 5 days
2 Place weights on the balance to measure the
Actual 12:00 12:00 12:00 12:00 12:00 12:00
difference of the weights on both sides. For Time pm pm pm pm pm pm
example, 4g can be measured as shown below. 12:10 12:20 12:30 12:40 12:50
pm pm pm pm pm
2g4g 6g TimFaeston 12:00
6 2 4g the Broken pm 10 20 30 40 50
Clock
Difference 0
(minutes.)
1 g 3 2 1 g, 4 g 6 2 4 g, 12 12, 720, 72, 12
5 g 2 3 5 g, 7 g 6 3 2 7 g,
8 g 2 6 8 g, 9 g 3 6 9 g, TryItAgain The clock needs to run 12 hours ( 720
11 g 2 3 6 11 g minutes) faster than the actual time to tell
2 g, 3 g, 6 g (weights already given) the correct time. So it would take 720 4
180 days for the clock to tell the correct
Therefore, the measurable weights are 1 g, 2 g, time. Therefore, it will tell the correct time
3 g, 4 g, 5 g, 6 g, 7 g, 8 g, 9 g and 11 g. after 180 days, at 12 pm.
3 Use the 1 cm and 3 cm strips to measure lengths Type 15-1 Just in Time p.130~p.131
from 1 cm to 4 cm. Use the remaining 6 cm strip 1 The shuttle bus leaves every 20 and 40 minutes,
to measure all lengths from 5 cm to 10 cm. and it takes about 1 hour and 10 minutes to get
1 1, 2 3 1, 3 3, 4 3 1, 5 6 1, 6 6, to Magic Land. Given that Sarah will leave home
7 6 1, 8 6 3 1, 9 6 3, 10 6 3 1. at 11 am, all possible answers are shown below.
1 cm, 3 cm, 6 cm Time to Take the Bus Time to Arrive at Magic Land
4 Amount of Juice (L) 12 : 40 1 : 50
Steps 8-L 5-L 3-L 12 : 20 1 : 30
Container Container Container 11 : 40 12 : 50
Start 8 0 0 11 : 20 12 : 30
350
323 2 Time to Meet Time to Take Time to Arrive
620 at the Bus Stop the Bus at Magic Land
602
152 12 : 30 12 : 40 1 : 50
143 12 : 10 12 : 20 1 : 30
440 11 : 30 11 : 40 12 : 50
11 : 10 11 : 20 12 : 30
Answers will vary.
NUMINO Challenge B1
