Ncert-class 9-maths-Number System Welcome to your Ncert-class 9-maths-Number System 1. Which one of the following has a terminating decimal expansion? 7/8 5/32 8/15 1/12 None 2. After rationalizing the denominator of $$ \frac{7}{3\sqrt{3}-2\sqrt{2}}$$we get the denominator as 19 5 35 13 None 3. Find the product of following with its conjugate pair. √5+1 conjugate pair =√5+1 , product = 3 conjugate pair =√5-1 , product = 3 conjugate pair =√5+1 , product = 4 conjugate pair =√5-1 , product = 4 None 4. a×a×b×b×b can be written as a³b³ a²b³ a³b² None None 5. Section AA rational number between √2 and √3 is (√2 x √3)/2 1.8 (√2 + √3)/2 1.5 None 6. Simplify $$\frac{7+3\sqrt{5}}{3+\sqrt{5}}-\frac{7-3\sqrt{5}}{3-\sqrt{5}}$$ None √5 √15 √7 None 7. The product of √x +2√y with its conjugate is? x−4y x+2y x+4y x−2y None 8. Which of the following rational numbers is positive? 19/-13 -8/7 -3/-4 -21/12 None 9. A number of the form p/q is said to be a rational number if p and q are integers and q ≠ 0 p and q are integers p and q are integers and p ≠ 0 also q ≠ 0 p and q are integers and P ≠ 0 None 10. Find one irrational number between 0.2101 and 0.2222. None 0.2 0.22010010001....... 0.25 None 11. ............... numbers have terminating and non- terminating repeating decimals. Whole Irrational Rational Integers None 12. 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 ? A is True and R is the correct explanation of A A is True and R is False Both A and R are False A is False and R is the correct explanation of A None 13. Simplify $$(6^{-1}-8^{-1})^{-1}-(2^{-1}-3^{-1})^{-1}$$ 40 10 20 30 None 14. 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 15. 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 3,2,4,1 2,4,1,3 3,2,1,4 1,2,3,4 None 16. The square root of any prime number is rational co-prime composite irrational None 17. Simplify $$7\sqrt{48}-\sqrt{72}-7\sqrt{27}+3\sqrt{2}$$ 5√3 - 3√2 25√3 - 3√2 25√3 - 9√2 25√3 - 13√2 None 18. Choose the correct alternative answer for the question given below. Which one of the following is an irrational number? √5 √196 3/9 $$\sqrt{\frac{16}{25}}$$ None 19. 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 20. 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 and 3 3 only 1 only 2 only 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.
