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Class 11 | CBSE | MATHEMATICS
SETS | MCQ (NEP PATTERN)

MATHEMATICS CLASS 11 :


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📘 MCQ WORKSHEET – OPERATIONS ON SETS (NEP PATTERN)

Class 11 | CBSE Mathematics | Chapter 1: Sets

🧠 Neurological Insight: MCQs activate recognition memory before recall memory. This reduces anxiety, strengthens neural pathways, and prepares the brain for higher-order problem solving in board and competitive exams.

Section A: Union of Sets (1.9.1)

Q1. If A = {1, 3, 5} and B = {3, 4, 6}, then A ∪ B is:

(a) {3}
(b) {1, 3, 5}
(c) {1, 3, 4, 5, 6}
(d) {4, 6}

✅ Correct Answer: (c) {1, 3, 4, 5, 6}
🧠 Brain Tip: Union is processed as mental aggregation. The brain naturally groups items, making union the fastest operation to recall.

Section B: Intersection of Sets (1.9.2)

Q2. If P = {a, b, c, d} and Q = {c, d, e}, then P ∩ Q equals:

(a) {a, b}
(b) {c, d}
(c) {a, b, c, d, e}
(d) ∅

✅ Correct Answer: (b) {c, d}
🧠 Neurological Insight: Intersection activates the brain’s pattern-matching circuit. Overlapping elements are remembered longer than isolated ones.

Section C: Difference of Sets (1.9.3)

Q3. If X = {2, 4, 6, 8} and Y = {4, 8}, then X − Y is:

(a) {4, 8}
(b) {2, 6}
(c) {2, 4, 6, 8}
(d) ∅

✅ Correct Answer: (b) {2, 6}
🧠 Brain Logic: Difference is handled as selective elimination. This sharpens attention and improves accuracy in exams.

Section D: Mixed Concept (NEP Competency-Based)

Q4. If A = {1, 2, 3}, B = {3, 4}, then which of the following is correct?

(a) A ∩ B = {1}
(b) A ∪ B = {1, 2, 3, 4}
(c) B − A = {3}
(d) A − B = {3}

✅ Correct Answer: (b) A ∪ B = {1, 2, 3, 4}
🧠 NEP Skill: Mixed MCQs test concept switching — the brain’s ability to shift rules quickly, a key competency in CBSE pattern questions.
🔑 1-Second Brain Recall Formula:
∪ → Combine  |  ∩ → Common  |  − → Remove

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