Determinants
Calculate 2×-2 and 3×-3 matrix determinants using cross-multiplication and cofactor expansion.
For 2×-2: ad − bc. For 3×-3: expand along the row/column with the most zeros.
Visual Methods
Level Visual Guides
20 levels. Each level opens as 6 visual blocks.
Level 1 - foundation
2×2 (1-5)
6 image blocks
Level 2 - foundation
2×2 (1-9)
6 image blocks
Level 3 - realistic untimed
2×2 mixed (±5)
6 image blocks
Level 4 - foundation
2×2 mixed (±9)
6 image blocks
Level 5 - foundation
2×2 mixed (±12)
6 image blocks
Level 6 - foundation
2×2 mastery (±15)
6 image blocks
Level 7 - build-up
3×3 with full row of zeros
6 image blocks
Level 8 - realistic untimed
3×3 with full column of zeros
6 image blocks
Level 9 - build-up
3×3 triangular (upper)
6 image blocks
Level 10 - build-up
3×3 triangular (lower)
6 image blocks
Level 11 - build-up
3×3 (1-4)
6 image blocks
Level 12 - build-up
3×3 (±4)
6 image blocks
Level 13 - realistic untimed
3×3 sparse (±6)
6 image blocks
Level 14 - mastery
3×3 (±6)
6 image blocks
Level 15 - mastery
3×3 mastery (±9)
6 image blocks
Level 16 - realistic untimed
2x2 realistic signed (no timer)
6 image blocks
Level 17 - realistic untimed
2x2 realistic open (no timer)
6 image blocks
Level 18 - realistic untimed
3x3 sparse realistic (no timer)
6 image blocks
Level 19 - realistic untimed
3x3 triangular realistic (no timer)
6 image blocks
Level 20 - realistic untimed
3x3 open challenge (no timer)
6 image blocks