Question

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CLASS 9 MATHS CHAPTER 1 NUMBER SYSTEM​

Answer 1

Answer:

Step-by-step explanation:

Class - 9th

Chapter - 1 (Number Systems)

1. Express the following numbers in the form of p :

(a) -25.6875

(b) 0.621621621..

(c) 15.712121212..

2. Write one rational & one fractional number between 0.515115111.... and 0.535335333....

3. Write one example each of two irrational numbers whose:

(a) Sum is a rational number

(b) Product is an irrational number

(c) Difference is an irrational number

(d) Quotient is a rational number

4. Simplify : [{ (625) -1/2 } -1/4 1 2

5. (a) Find the value of x if 2" x 5* * =1250

(b) Find the value of x and y if:

3* =9 & 42 = 64

6. Find the value of a & b if 5 + 2v3 = a + bv3

7+ 4V3

7. If x = 3 + V8, then find the value of x + 1.

Answer 2

Answer:

2,250 + 1,750 – 875 = 3,125 ∴ Number of people who do not read Hindi or English newspaper = 5,000 – 3,125 = 1,875. Number of people reading only English newspaper = n (only A) = n(A) – n(A ∩ B) = 2,250 – 875 = 1,375.

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