Development of AHMES (Automatical Higher Mathematics Examination System) Using Rational Unified Process

Table 7

Difficulty adjustment result.

Engine name	Before adjustment	After adjustment
Algebraic cofactor	1–5	1–3
Determinant value	1–5	3–5
Inverse matrix	1–5	3–5
Inverse matrix_1	1–5	3–4
Inverse matrix with x1	1–3	1–2
Inverse matrix with x2	1–4	2–5
Linear equations	1–5	1–4
Operation1	1–2	1–1
Operation2	2–5	1–5
Unknown matrix_1	1–5	5–5
Unknown matrix_2	2–5	5–5