Page 240 - Maths Skills - 8

2 Maths

7. The least number that must be added to 435 to make it a perfect square is

(a) 4 (b) 8 (c) 3 (d) 6

8. The volume of adjoining cylinder is
(a) 5600 cm 3 14 cm

(b) 3800 cm 3
(c) 4200 cm 3 20 cm
(d) 3080 cm 3

4
9. If x + 1 = 6239 find the value of x + 1 is
x 4 x
(a) 9 (b) 12 (c) 18 (d) 6

10. Which of the following rational numbers is greatest?

3 −5 −16 −13
(a) (b) (c) (d)
− 7 14 56 28

Section - B

Case Study - 1

Juhi wants to purchase some books for her library.
The total amount paid by Juhi for purchasing some

novels at a rate of ` (a – 2b) is ` (a – 4ab + 4b ).
2
2
She also purchased some literature books at rate of
` (2a + b) is ` (10a + 17ab + 6b ). And some magazine
2
2
at rate ` (6a + b) is ` (6a – 17ab – 3b ).
2
2
Based on the given information answer the
following questions:
1. How many novel she purchased for library? [1]

(a) (4 a-b) (b) (a – 2b) (c) (4 – ab) (d) (4ab)

2. How many literature books she purchased for library?  1 1  


2 
(a) (5a + 6b) (b) (5a + b) (c) (5 + 6b) (d) (a + 6b)

3. How many magazines she purchased for library?    1 1 

2 

(a) (a – 3b) (b) (3b) (c) (4a – 3b) (d) (a – 9b)