**Practice Advance Mathematics Quiz for SSC CGL and other exams.**

**1.The height of an equilateral triangle whose perimeter is 27 cm. is :**

(a) 9/2 √3 cm

(b) 9/2 cm

(c) 9 cm

(d) none of these

**2.Find the distance between the two parallel sides of a trapezium if the area of the trapezium is 250 sq.m and the two parallel sides are equal to 15 m and 10 m respectively.**

(a) 15 m

(b) 20 m

(c) 25 m

(d) 22 m

**3.The length of a rectangle is increased by 60%. By what percent would the width be decreased so as to maintain the same area?**

(a) 37 1/2%

(b) 60%

(c) 75%

(d) 120%

**4.The volume of a sphere is 8 times that of another sphere. What is the ratio of their surface areas?**

(a) 8 : 1

(b) 4 : 1

(c) 2 : 1

(d) 4 : 3

**5.How many litres of water flow out of a pipe having an area of cross-section of 5 cm^2 in one minute, if the speed of water in the pipe is 30 cm/s?**

(a) 90 L

(b) 15 L

(c) 9 L

(d) 1.5 L

**6.A cylindrical rod of length h is method and cast into a cone of base radius twice that of the cylinder. What is the height of the cone?**

(a) 3h/4

(b) 4h/3

(c) 2h

(d) h/2

**7. If two numbers are each divided by the same divisor, the remainders are 3 and 4, respectively. If the sum of the two numbers be divided by the same divisor, the remainder is 2. The divisor is**

(a) 9

(b) 7

(c) 5

(d) 3

**8. It is given that [2^(32) + 1] is exactly divisible by a certain number. Which one of the following is also definitely divisible by the same number?**

(a) [2^(96) + 1]

(b) [7 × 2^(33)]

(c) [2^(16) – 1]

(d) [2^(16) + 1]

9. In a question on division, the divisor is 7 times the quotient and 3 times the remainder. If the remainder is 28, then the dividend is

9. In a question on division, the divisor is 7 times the quotient and 3 times the remainder. If the remainder is 28, then the dividend is

(a) 588

(b) 784

(c) 823

(d) 1036

**10. 64329 is divided by a certain number. While dividing, the numbers, 175, 114 and 213 appear as three successive remainders. The divisor is**

(a) 184

(b) 224

(c) 234

(d) 296

**Answers**

1.(a) 3a = 27

a = 9cm

height = √3/2 a = 9/2 √3

2.(b) Area = 1/2(sum of parallel sides) * (distance between them)

=> 250 = 1/2(15 + 10) * h

=> h = 20m

3.(a) Let length = width = 100m

If length = 160m, then let width = x m

s.t. 160x = 10000

=> x = 10000/160 = 1000/16 = 62 1/2

so width is reduced to 37 1/2 %

4.(b) ; According to question,

4/3 ฯ(r1)^3 = 8 × 4/3 ฯ(r2)^3

(r1)^3/(r2)^3 =8 => r1/r2 = 2/1

Required ratio =(4ฯ〖r1〗^2)/(4ฯ〖r2〗^2 )= 〖(2/1)〗^(2 ) = 4/1

5.(c); Height of water in a second = 30 cm

Height of water in 60 second = 30 * 60

h = 1800 cm

Area of cross section = ฯr^2=5sq cm

Volume of water flow in one minute = ฯr^2 h

= 5 * 1800 = 9000 cu cm = 9000/1000 It = 9 lt

6.(a) ; Let the radius of cylinder be r and radius of cone be R

R = 2r

According to question,

Volume of cylinder = Volume of cone

ฯr^2 h=1/3 ฯR^2 H

r^2 h=1/3 ฯ(2r)^2 H

H = 3h/4