Ncert-class 9-maths-Number System Welcome to your Ncert-class 9-maths-Number System 1. 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 and q ≠ 0 p and q are integers and P ≠ 0 p and q are integers None 2. 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 1 only 3 only 2 and 3 None 3. 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 3,2,1,4 2,4,1,3 1,2,3,4 3,2,4,1 None 4. Simplify $$(6^{-1}-8^{-1})^{-1}-(2^{-1}-3^{-1})^{-1}$$ 30 40 20 10 None 5. Simplify $$\frac{7+3\sqrt{5}}{3+\sqrt{5}}-\frac{7-3\sqrt{5}}{3-\sqrt{5}}$$ √15 None √7 √5 None 6. a×a×b×b×b can be written as None a³b³ a³b² a²b³ None 7. Choose the correct alternative answer for the question given below.What is √n, if n is not a perfect square number? Natural number All are correct Irrational number Rational number None 8. Which one of the following has a terminating decimal expansion? 8/15 7/8 1/12 5/32 None 9. 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 10. Find the product of following with its conjugate pair. √5+1 conjugate pair =√5-1 , product = 4 conjugate pair =√5+1 , product = 4 conjugate pair =√5-1 , product = 3 conjugate pair =√5+1 , product = 3 None 11. Which of the following rational numbers is positive? -3/-4 19/-13 -21/12 -8/7 None 12. ............... numbers have terminating and non- terminating repeating decimals. Irrational Rational Whole Integers None 13. 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 14. Find one irrational number between 0.2101 and 0.2222. 0.22010010001....... 0.25 0.2 None None 15. After rationalizing the denominator of $$ \frac{7}{3\sqrt{3}-2\sqrt{2}}$$we get the denominator as 13 35 19 5 None 16. Simplify $$7\sqrt{48}-\sqrt{72}-7\sqrt{27}+3\sqrt{2}$$ 25√3 - 13√2 25√3 - 9√2 5√3 - 3√2 25√3 - 3√2 None 17. The product of √x +2√y with its conjugate is? x−4y x−2y x+2y x+4y None 18. Section AA rational number between √2 and √3 is (√2 + √3)/2 1.8 (√2 x √3)/2 1.5 None 19. The square root of any prime number is co-prime composite rational irrational None 20. 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 False and R is the correct explanation of A A is True and R is False A is True and R is the correct explanation of A 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.
