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Class 10 Mathematics के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

MathematicsIf A ∪ B′ = U, which of the following statements must be true?Class 10SetsComplement of a Set and Its PropertiesLevel 21Medium MathematicsIf A \ B = ∅, which of the following statements must always be true?Class 10SetsComplement of a Set and Its PropertiesLevel 20Easy MathematicsFor subsets A and B of a universal set U, if A ⊆ B, which relation between their complements is correct?Class 10SetsComplement of a Set and Its PropertiesLevel 20Medium MathematicsIf A ⊆ B ⊆ U, n(U) = 150, n(A) = 64, and n(B) = 97, what is n(A′ ∩ B)?Class 10SetsComplement of a Set and Its PropertiesLevel 20Easy MathematicsIf A ⊆ B ⊆ U, n(U) = 90, n(B) = 54, and n(A) = 31, what is n(A′ ∩ B)?Class 10SetsComplement of a Set and Its PropertiesLevel 19Easy MathematicsLet A and B be two sets in a universal set U. Which of the following statements is always true?Class 10SetsComplement of a Set and Its PropertiesLevel 19Medium MathematicsIf \(A\cap B=\varnothing\), which statement about \(B\) must be true?Class 10SetsComplement of a Set and Its PropertiesLevel 19Medium MathematicsLet \(U=\{1,2,\ldots,60\}\), \(A=\{x\in U:x\text{ is a multiple of }6\}\), and \(B=\{x\in U:x\text{ is a multiple of }18\}\). Then \(A'\cap B'\) is equal to which of the following?Class 10SetsComplement of a Set and Its PropertiesLevel 21Medium MathematicsIf, with respect to the universal set, \(A'\cup B=B\), which of the following conclusions is correct?Class 10SetsComplement of a Set and Its PropertiesLevel 21Medium MathematicsIf \(U=\{1,2,\ldots,32\}\), \(A=\{x:x\text{ is a multiple of }4\}\), and \(B=\{x:x\text{ is a multiple of }16\}\), how many elements are in \(A'\cup B\)?Class 10SetsComplement of a Set and Its PropertiesLevel 21Medium MathematicsIf A ⊆ B and B′ ⊆ C, which statement about A′ is always true?Class 10SetsComplement of a Set and Its PropertiesLevel 21Medium MathematicsIf A′ ⊆ B′, which conclusion is always correct?Class 10SetsComplement of a Set and Its PropertiesLevel 20Medium MathematicsIf the universal set is \(U=\{1,2,\ldots,27\}\), \(A=\{x\in U:x\text{ is a multiple of }3\}\), and \(B=\{x\in U:x\text{ is a multiple of }9\}\), how many elements are in \(A'\cup B\)?Class 10SetsComplement of a Set and Its PropertiesLevel 20Medium MathematicsIf \(A \cup B' = B'\), which of the following conclusions is always true?Class 10SetsComplement of a Set and Its PropertiesLevel 20Medium MathematicsIf A − B = ∅, which conclusion is always correct?Class 10SetsComplement of a Set and Its PropertiesLevel 20Easy MathematicsIf \(A\subseteq B'\), which of the following relations is always true?Class 10SetsComplement of a Set and Its PropertiesLevel 20Medium MathematicsIf A ∪ B′ = U, which relation is always true?Class 10SetsComplement of a Set and Its PropertiesLevel 19Medium MathematicsIf A ∩ B′ = ∅, which conclusion is always true?Class 10SetsComplement of a Set and Its PropertiesLevel 19Medium MathematicsIf A ⊆ B in a universal set U, which of the following relations is always true?Class 10SetsComplement of a Set and Its PropertiesLevel 19Medium MathematicsIf A ⊆ B ⊆ U, which relation is always true?Class 10SetsComplement of a Set and Its PropertiesLevel 19Hard