Aptitude - Squares & Cubes Online Quiz


Advertisements


Following quiz provides Multiple Choice Questions (MCQs) related to Squares & Cubes. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - √2500 +√961 = (?)2

A - 81

B - 3

C - 6561

D - 9

Answer : D

Explanation

Let √(√2500+√961) =x2. Then
x2= √(50+31) = √81= 9. ∴ x = √9 = 3

Q 2 - 250 /√?= 10

A - 25

B - 250

C - 625

D - 2500

Answer : C

Explanation

Let 250/√x  =10, Then √x= 250/10 25 ⇒ x= (25)2=625

Q 3 - if √2ⁿ=64, Then the value of n is:

A - 2

B - 4

C - 6

D - 12

Answer : D

Explanation

√2ⁿ = 64= 2⁶⇒ 2ⁿꜘ2=2⁶⇒n/2=6 ⇒ n=12.

Q 4 - √(0.28900/ 0.00121) = ?

A - 17/110

B - 170/11

C - 17/11

D - none of these

Answer : B

Explanation

√0.28900/ 0.00121 = √28900/121 = 170/11

Q 5 - √(0.00001225/0.00005329)=?

A - 25/73

B - 35/73

C - 25/77

D - 5/11

Answer : B

Explanation

Number of decimel places in the numerator = no.of decimel places in the denominator
∴ given expression = √(1225/5329) = √(35 * 35)/(73 * 73) = 35/73

Q 6 - if 52/x=√(169/289), Then the value of x is

A - 52

B - 58

C - 62

D - 68

Answer : D

Explanation

52/x  = √169/289 = 13/17
∴  13x =(52*17) ⇒ x=(52*17)/13 =68

Q 7 - if √15 = 3.88, then what is the value of √5/3?

A - 1.29

B - 1.2934

C - 1.293

D - 1.295

Answer : C

Explanation

√5/3 = √15*9=  3.88/3  =1.293

Q 8 - 48√? +32√? =320

A - 4

B - 8

C - 16

D - 24

Answer : C

Explanation

let 48√x+32√x=320 .then 80√x=320  ⇒√x=320/80 ⇒x= 42=16

Q 9 - if 6 = 2.55 , then the value of √2/3 +3√3/2 is

A - 4.48

B - 4.49

C - 4.50

D - none of these

Answer : D

Explanation

√2/3 +3√3/2 =√2/3*3/3  +3√3/2*2/2 = √6/9+ 3√6/4
=√6/√9= 3*√6/√4 =√6/3+3√6/2 = 2√6+9√6/6  = 11√6/6  = 11*2.55/6
= 28.05/6 = 4.675

Q 10 - √0.064 = ?

A - 0.8

B - 0.08

C - 0.008

D - 0.252

Answer : D

Explanation

√0.064 = √ 0.252 * 0.252 = 0.252


aptitude_squares_cubes.htm

Advertisements