At primary level, tests in mathematics should NOT focus on :

Correct option is D

At the primary level, the focus of mathematics education should be on developing students' conceptual understanding and problem-solving skills. Students should be able to apply their mathematical knowledge to real-world situations, and they should be able to understand the concepts behind the procedures they are learning. Complex questions can put too much emphasis on memorization and procedural fluency, and they can discourage students who are not yet ready for this level of challenge.
Therefore, tests in mathematics at the primary level should focus on assessing students' understanding of concepts, their ability to apply their knowledge to real-world situations, and their problem-solving skills. They should not focus on students' ability to solve complex questions.