Aptitude - Squares & Cubes Online Quiz


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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 - 2592/ √?= 324

A - 144

B - 64

C - 16

D - 8

Answer : B

Explanation

Let 2592 /√x= 324 . Then, √x = 2592/324 = 8 ⇒ x= 64

Q 2 - √32+√48/ √8+√12 = ?

A - √2

B - 2

D - 8

Answer : B

Explanation

(√32+√48)/( √8+√12) =(√16*2 +√16*3)/ √4*2 +√4*3)
= 4√2+4√3/ 2√2+2√3  = 4(√2+√3)/ 2(√2+√3) =2

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 - √0.0009 /√0.01= ?

A - 3

B - 0.3

C - 1/3

D - none of these

Answer : B

Explanation

Given expression = √0.0009/ √0/01 = 0.03/0.10 =3/10 =0.3

Q 5 - if √841 = 29, then √0.00000841 = ?

A - 0.00029

B - 0.0029

C - 0.029

D - 0.29

Answer : B

Explanation

√0.00000841 =  √841/100000000 = 29/10000= 0.0029

Q 6 - Square root of (0.081/0.0064 * 0.484/6.25 *2.5/12.1) is

A - 0.45

B - 0.75

C - 0.95

D - 0.99

Answer : A

Explanation

Given exp . = √(0.0810/0.0064 )*(0.484/6.250)*(2.5/12.1)
 =√ (810/64* 484/6250 *25/121)  = √81/400   = 9/20  =0.45

Q 7 - if √1296 = 36 , then the value of (√12.96 + √0.1296 + √0.001296 + √0.00001296 is:

A - 0.39996

B - 3.9996

C - 39.996

D - none of these

Answer : B

Explanation

Given Exp .  = √1296/100 + √1296/10000 +√1296/ 1000000+ √1296/100000000
=(36/10+ 36/100+36/1000+ 36/10000 ) =(3.6+0.36+0.036+0.0036)= 3.9996.

Q 8 - if (5+ 2√3)/(7+ 4 √ 3) = a+b√3 , then

A - a= -11 , b=-6

B - a= -11, b= 6

C - a= 11, b=-6

D - a= 6, b= 11

Answer : C

Explanation

a+b√3 = (5+2√3/ 7+4√3* 7-4√3/7-4√3)
=  (35-20√3+14√3-24)/(49-48) = 11-6√3

Q 9 - if √24 = 4.899, then the value of √8/3 is:

A - 0.544

B - 2.666

C - 1.633

D - 1.333

Answer : C

Explanation

√8/3 = √8*3/3*3 = √24/√9 =√24/3 =4.899/3 =1.633

Q 10 - if √256 /√x =2 , then x = ?

A - 64

B - 128

C - 512

D - 1024

Answer : A

Explanation

√256/√x =2 ⇒ 16/√x =2 ⇒√x= 16/2 = 8 ⇒ x= 82= 64


aptitude_squares_cubes.htm

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