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 - 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 - 112/ √196 * √576/12 *√256/8 =?

A - 8

B - 12

C - 16

D - 32

Answer : D

Explanation

given Exp = 112/14*24/12* 16/8 =(8*2*2)= 32

Q 4 - √88209 = ?

A - 187

B - 244

C - 257

D - 297

Answer : D

Explanation

√88209= √297*297 = 297

Q 5 - if √256 /√x= 2, then x is equal to:

A - 64

B - 128

C - 512

D - 1024

Answer : A

Explanation

let √256/√x =2 . then √x= √256/2 = 16/2 =8 ⇒ x=(8*8) =64

Q 6 - √ (25/81-1/9) = ?

A - 2/3

B - 4/9

C - 16/81

D - 25/81

Answer : B

Explanation

   √ (25/81-1/9) =√ (25-9)/81   = √16/81  = 4/9

Q 7 - if √4096=64 , then the value of (√40.96 + √ 0.4096 + √0.004096 + √ 0.00004096) up to two places of decimal is :

A - 7.09

B - 7.10

C - 7.11

D - 7.12

Answer : C

Explanation

Given exp . √ 4096/100 +√ 4096/10000+√ 4096/1000000+√ 4096/100000000
=(64/10+ 64/100+64/1000+64/10000)= (6.4+0.64+0.064+0.0064+0.0064)= 7.11

Q 8 - if √0.05* 0.5*a = 0.5*0.05 *√b, then a/b=?

A - 0.0025

B - 0.025

C - o.25

D - 25

Answer : B

Explanation

√a/√b = 0.5*0.05/√0.05* 0.5 =  √0.5*0.05  ⇒ a/b
 =(0.5*0.05) = 0.025

Q 9 - The value of 1/(√2+1)+1/(√3+√2)+1/(√4+√3)...+1/(√121+√120) is

A - √120

B - 12√2

C - 8

D - 10

Answer : D

Explanation

given exp. =1/(√2+1)+1/(√3+√2)+1/(√4+√3)...+1/(√121+√120)
=1/(√2-1)* √2-1)/( √2-1)+1/(√3+√2)* √3-√2/√3-√2+1/(√4+√3)*( √4-√3)/( √4-√3)+?..+1/√121+√120*(√121-√120/√121-√120
= (√2-1)+( √3-√2)+( √4-√3)?..+( √121-√120) =(√121-1)
= (11-1) = 10.  ≤

Q 10 - 1250 oranges were distributed among a group of girls of a class. Each girls got twice as many oranges as the number of girls in that group . The number of the girls was :

A - 25

B - 45

C - 50

D - 100

Answer : A

Explanation

let there be x girls in the group. Each girl got 2x oranges.
∴ 2x*x = 1250  ⇒ 2x2 =1250  ⇒ x2 =625 ⇒ x= √625  =25
Number of girls in the group= 25
aptitude_squares_cubes.htm
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