Ncert-class 9-maths-Number System Welcome to your Ncert-class 9-maths-Number System 1. Consider the following statements: 1/22 cannot be written as a terminating decimal.2/15can be written as a terminating decimal.1/16 can be written as a terminating decimal.Which of the statements given above is/are correct? 2 only 2 and 3 1 only 3 only None 2. Section AA rational number between √2 and √3 is (√2 x √3)/2 (√2 + √3)/2 1.8 1.5 None 3. Simplify $$\frac{7+3\sqrt{5}}{3+\sqrt{5}}-\frac{7-3\sqrt{5}}{3-\sqrt{5}}$$ None √5 √15 √7 None 4. Give an example of two irrational numbers, whose difference is a rational number. 4-√2,2+√2 4+√2,2-√2 4-√2,2-√2 4+√2,2+√2 None 5. ............... numbers have terminating and non- terminating repeating decimals. Rational Integers Whole Irrational None 6. Which one of the following has a terminating decimal expansion? 8/15 5/32 7/8 1/12 None 7. The square root of any prime number is composite irrational co-prime rational None 8. Following are the steps to represent √5 on number line.Arrange them in order.1) Draw OC on line with l(OC) =l(OB)2) Draw AB⊥OA and l(AB)=13) Take l(OA)=24) l(OC)=√5, C is required point on real line 2,4,1,3 3,2,4,1 3,2,1,4 1,2,3,4 None 9. After rationalizing the denominator of $$ \frac{7}{3\sqrt{3}-2\sqrt{2}}$$we get the denominator as 19 13 35 5 None 10. If A : The quotient of two integers is always a rational number, and R : 1/0 is not rational, then which of the following statements is true ? Both A and R are False A is True and R is False A is True and R is the correct explanation of A A is False and R is the correct explanation of A None 11. Choose the correct alternative answer for the question given below. Which one of the following is an irrational number? √196 3/9 $$\sqrt{\frac{16}{25}}$$ √5 None 12. Simplify $$(6^{-1}-8^{-1})^{-1}-(2^{-1}-3^{-1})^{-1}$$ 40 10 20 30 None 13. Choose the correct alternative answer for the question given below.What is √n, if n is not a perfect square number? Irrational number Natural number All are correct Rational number None 14. a×a×b×b×b can be written as a²b³ None a³b³ a³b² None 15. Find one irrational number between 0.2101 and 0.2222. 0.2 0.22010010001....... None 0.25 None 16. A number of the form p/q is said to be a rational number if p and q are integers and p ≠ 0 also q ≠ 0 p and q are integers p and q are integers and q ≠ 0 p and q are integers and P ≠ 0 None 17. The product of √x +2√y with its conjugate is? x+2y x−4y x−2y x+4y None 18. Find the product of following with its conjugate pair. √5+1 conjugate pair =√5-1 , product = 3 conjugate pair =√5+1 , product = 4 conjugate pair =√5+1 , product = 3 conjugate pair =√5-1 , product = 4 None 19. Simplify $$7\sqrt{48}-\sqrt{72}-7\sqrt{27}+3\sqrt{2}$$ 25√3 - 13√2 5√3 - 3√2 25√3 - 9√2 25√3 - 3√2 None 20. Which of the following rational numbers is positive? -3/-4 -21/12 19/-13 -8/7 None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
