Item: tModelVerbalRuleArithmetic2a
Stem:
International time is based on the time in Greenwich, England, which is in time zone 0.
There are twelve time zones to the west and twelve times zones to the east of time zone
0. As one moves to the east of time zone 0, 1 hour is added for each time zone. As
one moves to the west of time zone 0, 1 hour is subtracted for each time zone. New
York is 5 times zones to the west of Greenwich, and Finland is 2 time zones to the
east of Greenwich.
When it is 9 A.M. on Tuesday in Finland, what time is it in New York?
Options:
4 A.M. on Monday
7 A.M. on Tuesday
2 A.M. on Tuesday
4 P.M. on Tuesday
Key:
- Observable: 1.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. You didn't count the
extra time zones to get to Greenwich.
The correct answer is 2 A.M. on Tuesday.
-
Teacher:The student probably computed 8 time zones to the east
of Finland and forgot about the 2 time zones to Greenwich.
- Observable: 2.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. You got the time in Greenwich, but
now you have to find the time in New York!
The correct answer is 2 A.M. on Tuesday.
-
Teacher:The student computed Greenwich time.
- Observable: 3.
Score: 1;
Evidence Value: 1.
-
Student:Correct, good job!
-
Teacher:Student has answered correctly.
- Observable: 4.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. You needed to subtract instead of add, because
the time in New York is always earlier than Finland.
The correct answer is 2 A.M. on Tuesday.
-
Teacher:The student added 7 to Finland's time, instead
of going 7 hours earlier.
Metadata:
Item Node: tModelVerbalRuleArithmetic2a,
Difficulty: 2.
Proficiencies: ModelArithmetic,
VerbalRuleArithmetic.