CBSE Class 9 Mathematics Number System Assignment Set C

Question. Starting with 0, a growing number sequence is generated by the rule given below.
To get the next number:
Substitute 0 with 01. Substitute 1 with 10.
Accordingly, the first four terms of the sequence are 0---->01--------->0110------>01101001
What is the next number in the sequence?
A. 110000000000000
B. 0110100110010110
C. 11010011001
D. 11010010110

Answer : B

Question. In Nirmal Public school, 28 students have joined the Chess Club and 32 have joined the Carrom Club. Among these, there are 5 students who have joined both the clubs. Altogether how many students have joined these two clubs?
A. 50
B. 55
C. 60
D. 65

Answer : B

Question. A pathway in Manju's garden is made of 100 white tiles arranged in a single row. Manju decides to add some colour to her garden by painting some of the tiles. Starting from one end, she paints every second tile yellow. Still not happy with the result, she proceeds to paint every second one of the YELLOW tiles blue. How many yellow tiles are there in the pathway now?

A. 50
B. 55
C. 60
D. 65

Answer : C

Question. A deck of playing cards consists of 52 cards. How many levels high would the highest (complete) card house that can be made with a SINGLE deck be?
A. 4
B. 5
C. 6
D.8

Answer : B

Question. How many cards would be needed to make a n-level high card house?
A. 3n
B. 4n - 1
C. 3n/2 + 4
D. n/2 (3n+1)

Answer : D

Question. The International system of naming big numbers is different from the Indian system. A comparative chart of the two systems is shown below:How will the number 'Forty million five hundred thousand and ten' be named in the Indian system?

A. Forty five lakhs and ten
B. Forty crores five lakhs and ten
C. Four crores fifty lakhs and ten
D. Four crores five lakhs and ten

Answer : D

Question. Ram: What is the relationship between 150% of a number and 50% of the same number?
Sheetal: 150% of the number will be three times 50% of the number - because 150 is three times 50.
Sarika: Of course not. It depends on the number of which you are taking 50% and 150%
Rohan: Wrong - 150% of a number will always be MORE than three times 50% of the same number.
Ahmed: Well, I think 150% would be less than three times 50% of that number.
Who has answered Ram's question correctly?
A. Sheetal
B. Sarika
C. Rohan
D. Ahmed

Answer : A

Question. If the ratio of Ravi's age to John's age is 2 : 3, which of the following is true about their actual ages?
A. John's age is 1^1/2 times Ravi's age
B. Ravi is a year younger than John
C. John is 3 times as old as Ravi
D. Ravi's age is half of John's age

Answer : A

Question. If n is a rational number other than 0, which of the following is NOT necessarily a rational number?
A. 13/n
B. n³
C. 3 - n
D. √n

Answer : D

Question. A number is called a perfect square if it is the square of a whole number. If m and n are two perfect squares, which of the following MUST also be a perfect square?
A. m + n
B. 2m
C. 4n
D. m² + n²

Answer : C

Question. The fuel tank of Shailaja's car has a capacity of 37 litres. One day, when she goes to the petrol station, the fuel gauge of her car looks like this: About how many litres of petrol are required to completely fill the fuel tank of Shailaja's car?

A. 10
B.14
C. 18
D. 23

Answer : B

Question. Bablu's height increased by 10% over the last year. What is the ratio of his last year's height to this year's?
A. 10:11
B. 9:10
C. 11:10
D. 1:10

Answer : A

Question. A number N is increased by 100%. The result is then decreased by 100%. The final result will be
A. 50N
B. N
C. N/2
D. 0

Answer : D

Question. Study the values in rows X, Y and Z below. If we choose numbers x, y and z from rows X, Y and Z respectively, what is the maximum possible value of z-y/x  ?

A. 1.4
B. 5
C. 7
D. 11

Answer : D

Question. When written in decimal form, which of the following will be a non-terminating, non-recurring number?
A. 1^1/9
B. 2^1/9
C. 2^-9
D. 9^1/2

Answer : B
 

Number Systems

Q 1 Is every real number is a rational number ?

Q 2 Is 1.01001000100001 …… irrational? If so, why?

Q 3 Is every whole number is a natural number ?

Q 4 Look at the following examples of rational number in the form p/q (q 0),where p and q integers with no common factors othe than 1 and having terminating decimal representations. Can you guess the property which satisfy q ?

Q 5 Is zero a rational number? Explain it.

Click on link below to download CBSE Class 9 Mathematics Number System Assignment Set C