Item: tModelExtendArithmetic1a
Stem:
A gardener plants rose bushes in rows in a triangular
flowerbed. The first row has only one rose bush. If each row
has two more rose bushes than the preceding row, how many rose
bushes are in the 5th row?
Inputs:
- Enter your answer here:
Key:
- Observable: 9.
Score: 1;
Evidence Value: 1.
-
Student:Well done!
-
Teacher:The student got this item correct.
- Observable: 25.
Score: 0;
Evidence Value: 0.
-
Student:Good try, but incorrect. You wrote the total number of
rose bushes. There are 9 rose bushes in the 5th row.
-
Teacher:Student seems to have counted all the rose bushes,
and not only the number in the 5th row.
- Observable: 15.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that was incorrect. Each row has 2 more bushes
than the previous row, giving the 5th row 9 rose bushes.
-
Teacher:Seems that each row in this solution has one more than
the previous row.
- Observable: .
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that was incorrect. Each row has 2 more bushes
than the previous row, giving the 5th row 9 rose bushes.
-
Teacher:The student did not get this item right.
Metadata:
Item Node: tModelExtendArithmetic1a,
Difficulty: 1.
Proficiencies: ModelArithmetic,
ExtendArithmetic.