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Class 9 Mcq

Class 9 Mathematics के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

MathematicsWhat is the basis of 3 ∣ a² ⇒ 3 ∣ a in the proof of √3?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 18Hard MathematicsWhich option shows a wrong shortcut in the proof of √3?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 18Hard MathematicsWhich option shows an invalid shortcut in the proof of √2?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 18Hard MathematicsWhat is the most exam-useful caution in the proofs of √2 and √3?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 17Hard MathematicsIf u and v are coprime and both are proved divisible by 3, what contradiction about gcd(u,v) follows?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 17Hard MathematicsWhich idea about the exponents of prime factors explains the irrationality of √2?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 17Hard MathematicsWhich statement is sufficient to reject the rational assumption for √3?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 17Hard MathematicsIn the proof of √3, what kind of step is it to write directly that v is divisible by 3 from u² = 3v²?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 17Hard MathematicsWhat is the correct argument involving the prime number 3 in the proof of √3?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 17Hard MathematicsIf a proof assumes √3 rational and finally gets both p and q divisible by 3, with which initial condition is the contradiction?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 16Hard MathematicsIn the proof of √3, if a student stops after proving only p is divisible by 3, what is the error?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 16Hard MathematicsIf an answer writes √2 = a/b but does not mention gcd(a,b) = 1, what is the best comment?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 16Hard MathematicsWhich statement is sufficient to reject the rational assumption in the proof of (√3)?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 16Hard MathematicsIn the proof of √2, which option correctly distinguishes an ordinary rational form from the proof-ready form?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 16Hard MathematicsWhich option shows the correct contrapositive-style use needed in proving √2 irrational?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 16Hard MathematicsIn the proof of √2, why is assuming a and b coprime more than a formality?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 16Hard MathematicsIf √2 = a/b is in lowest form, what does proving that both a and b are even show?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 16Hard MathematicsWhat caution is necessary while proving the irrationality of √2 and √3?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 18Medium MathematicsIf assuming √2 is rational gives a contradiction, which assumption is proved false?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 18Medium MathematicsIn the proof of √3, what does p = 3k show?Class 9Number SystemsProof of irrationality of square root 2 and square root 3Level 18Medium