COMSATS Mathematics — Matrices and Determinants
Matrices and Determinants is part of the Mathematics section of the NTS NAT-IE test COMSATS admits on (10 of the 90 MCQs). It breaks into 2 subtopics, and we hold 29 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (2)
How Matrices and Determinants is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Matrices and Determinants accounts for 7 questions. It appears in all 7, about 1 questions a paper. The heaviest was COMSATS Past Paper 07, with 1 question.
| Paper | Questions |
|---|---|
| COMSATS Past Paper 07 | 1 |
| COMSATS Past Paper 06 | 1 |
| COMSATS Past Paper 05 | 1 |
| COMSATS Past Paper 04 | 1 |
| COMSATS Past Paper 03 | 1 |
| COMSATS Past Paper 02 | 1 |
| COMSATS Past Paper 01 | 1 |
Matrices and Determinants MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 07 · Matrices and Determinants
If A = [2 0; 0 3] (rows 2, 0 and 0, 3), then A² is:
- A.[2 0; 0 3]
- B.[5 0; 0 5]
- C.[4 0; 0 9]
- D.[4 0; 0 6]
Show answer
Answer: C. [4 0; 0 9] — For a diagonal matrix, square each diagonal entry: 2² = 4, 3² = 9.
- Q2 · COMSATS Past Paper 06 · Matrices and Determinants
If A is a 2 × 3 matrix and B is a 3 × 4 matrix, the order of the product AB is:
- A.4 × 2
- B.2 × 4
- C.3 × 3
- D.AB is not defined
Show answer
Answer: B. 2 × 4 — (2 × 3)(3 × 4) gives a 2 × 4 matrix.
- Q3 · COMSATS Past Paper 05 · Matrices and Determinants
If two rows of a determinant are identical, its value is:
- A.one
- B.zero
- C.always negative
- D.doubled
Show answer
Answer: B. zero — A determinant with two equal rows is zero.