CBSE Class 9 Mathematics Number System Worksheet Set 07

Question. If 20% of your Maths score is equal to 30% of my Maths score on a test, which of the following best describes the relation between our scores?
A. Your score is 1(1/2) times mine.
B. My score is 1/2 times yours
C. You scored 10 marks more than me.
D. I scored 10% more than you.

Answer : A

Question. Which of the following statements can be true for a natural number N?
A. When N is divided by 3, the remainder is 3 and when N is divided by 6, the remainder is 0.
B. When N is divided by 3, the remainder is 0 and when N is divided by 6, the remainder is 3.
C. When N is divided by 3, the remainder is 1 and when N is divided by 6, the remainder is 0.
D. All the three statements can be true.

Answer : B

Question. The numbers in the (n + 1)th row of the Pascal's triangle also represent the coefficients of the terms in the expansion of  (x + y)ⁿ. For instance: (x + y)² = 1x² + 2xy + 1y², (x+y)³ = 1x³ + 3x²y + 3xy² + 1y³ .The 6th row of the triangle would represent the coefficients of which of these expressions?
A. (x + y)⁵
B. (x + 5y)⁶
C. (x + y)⁶
D. (x + y)⁴

Answer : A

Question. Which of the following is closest to 8.413/0.19 ?
A. 0.44
B. 4.4
C. 44
D. 440

Answer : C

Question. What decimal fraction of the figure below is shaded

A. 0.45
B. 0.045
C. 0.09
D. 0.18

Answer : D

Question. Scientific Notation is a concise way of writing any number in the form a x 10b where a is a number between 1 and 10 and b is an integer. For example, 652 would be written as 6.52 x 102 in this notation. Which of the following is most likely to contain a negative exponent of 10 when represented in scientific notation?
A. Number of cells in a honeycomb
B. Speed of light in kilometres per second
C. Diameter of a blood cell in centimetres
D. Mass of an airplane in kilograms

Answer : D

Question. In which of the following lists are ALL three numbers irrational?
A. 0, -3, 3.14
B. 22/7 , 0.0141414....., √3
C. √2,√3,√4
D. 3.919119111911119....,√5   , 

Answer : D

Question. If x is such that it satisfies BOTH the inequalities: -2 <x and x≤ 2      which of the following number lines correctly depicts the values of x?

Answer : A

Question. Which of the following numbers will have a '6' in the unit's place?
A. 2⁶
B. 2¹⁶
C. 2²⁶
D. 2⁴⁶  

Answer : B

Question. The set of Natural numbers is said to be 'CLOSED' under the operation '+' because for any Natural numbers m and n, the number m + n is also a Natural number. Under which operations is the set of Integers 'CLOSED'?
A. +, -, x and &divide;
B. +, - and x
C. only + and x
D. only + and -

Answer : B

Question. If p is a non-zero Rational number, which of the following might NOT be Rational?
A. √3p
B. p^-3
C. -p³
D. 3/p

Answer : A

Question. Which of the following is equal to 1?
A. 17^-2 + 17²
B. 17² - 17^-2
C. 17^-2 x 17²
D. 17²/17^-2

Answer : C

Question. Which of these numbers can be written as a non-terminating, repeating decimal?
A. √3p
B. √3
C. 3/24
D. 1/12

Answer : A

Question. If the square of  ‘x’ is 5, then square of ‘4x’ will be
​​​​​​​A. 400
B. 80
C. 60
D. 20

Answer : B
 

Please click the below link to access CBSE Class 9 Mathematics Worksheet - Number System (6)