COMSATS Mathematics — Number Systems and Complex Numbers
Number Systems and Complex Numbers is part of the Mathematics section of the NTS NAT-IE test COMSATS admits on (10 of the 90 MCQs). It breaks into 1 subtopic, and we hold 26 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (1)
How Number Systems and Complex Numbers is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Number Systems and Complex Numbers 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 |
Number Systems and Complex Numbers MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 07 · Number Systems and Complex Numbers
Which of the following is a purely imaginary number?
- A.5i
- B.i²
- C.5
- D.5 + i
Show answer
Answer: A. 5i — A purely imaginary number has real part 0: 5i = 0 + 5i.
- Q2 · COMSATS Past Paper 06 · Number Systems and Complex Numbers
What is the real part of (3 + 2i) × i?
- A.−2
- B.2
- C.3
- D.−3
Show answer
Answer: A. −2 — (3 + 2i)i = 3i + 2i² = −2 + 3i; real part −2.
- Q3 · COMSATS Past Paper 05 · Number Systems and Complex Numbers
(2 + 3i) − (5 − i) is equal to:
- A.−3 + 4i
- B.7 + 4i
- C.−3 + 2i
- D.3 − 4i
Show answer
Answer: A. −3 + 4i — (2 − 5) + (3 − (−1))i = −3 + 4i.