Item: tExtendOtherRecursive1b
Stem:
Extend the following sequence by giving the next two terms:
1, 3, 6, 10, 15, ...
Inputs:
- Enter your answers here:
- and
Key:
- Observable: 21,
28.
Score: 1;
Evidence Value: 1.
-
Student:Right!
-
Teacher:The student got this item correct.
- Observable: 16,
17.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. For problems like these, you need to find the
pattern between each of the numbers. The pattern may not be a single
common difference, as with arithmetic sequences.
The correct numbers are 21 and 28.
-
Teacher:The student seemed to have added 1
to get the next two numbers.
- Observable: 17,
19.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. For problems like these, you need to find the
pattern between each of the numbers. The pattern may not be a single
common difference, as with arithmetic sequences.
The correct numbers are 21 and 28.
-
Teacher:The student seemed to have added 2 (the difference between 1 and 3)
to get the next two numbers.
- Observable: 19,
23.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. For problems like these, you need to find the
pattern between each of the numbers. The pattern may not be a single
common difference, as with arithmetic sequences.
The correct numbers are 21 and 28.
-
Teacher:The student seemed to have added 4 (the difference between 10 and 15)
to get the next two numbers.
- Observable: .
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. For problems like these, you need to find the
pattern between each of the numbers. The pattern may not be a single
common difference, as with arithmetic sequences.
The correct numbers are 21 and 28.
-
Teacher:The student got this item incorrect.
Metadata:
Item Node: tExtendOtherRecursive1b,
Difficulty: 1.
Proficiencies: ExtendOtherRecursive.