COMSATS Mathematics — Sequences and Series
Sequences and Series 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 28 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (2)
How Sequences and Series is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Sequences and Series 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 |
Sequences and Series MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 07 · Sequences and Series
What is the sum of the first 10 terms of 2, 4, 6, 8, …?
- A.20
- B.55
- C.100
- D.110
Show answer
Answer: D. 110 — S = n/2 (first + last) = 10/2 × (2 + 20) = 110.
- Q2 · COMSATS Past Paper 06 · Sequences and Series
The sum to infinity of the geometric series 1 + 1/2 + 1/4 + 1/8 + … is:
- A.1
- B.3/2
- C.infinite
- D.2
Show answer
Answer: D. 2 — S∞ = a/(1 − r) = 1/(1 − 1/2) = 2.
- Q3 · COMSATS Past Paper 05 · Sequences and Series
If the arithmetic mean of 8 and x is 12, then x is:
- A.4
- B.20
- C.10
- D.16
Show answer
Answer: D. 16 — (8 + x)/2 = 12 → x = 16.