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Aptitude - Squares & Cubes Online Quiz

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.

Q 1 - 6250/ √? = 625

Answer : A

Explanation

Let 6250/√x=  625. Then √x= 6250/625 = 10 ⇒ 100

Q 2 - 248 + √ 52 +√144

Answer : B

Explanation

Given exp.= √248  +√52+12  = √248+ √64 = √248+8   =√256 = 16

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

Answer : D

Explanation

√2ⁿ = 64= 2⁶⇒ 2ⁿꜘ²=2⁶⇒n/2=6 ⇒ n=12.

Q 4 - 0.01 + 0.0064=?

Answer : A

Explanation

√0.001 + √0.0064 = √0.01+0.08  = √0.09 = 0.3

Q 5 - √0.01+ √0.81+ √1.21 + √0.0009 = ?

Answer : D

Explanation

given exp .=  √1/100+ √81/100 +√121/100 + √9/10000
= (1/10+ 9/10+11/10+3/10) =(0.1+0.9+1.1+0.03)=2.13

Q 6 - if √ 1+ x/144 = 13/12, then the value of x is :

Answer : D

Explanation

√1+x/144 = 13/12   ⇒ (1+x/144)⇒ (13/12)²= 169/144
⇒  x/144=(169/144-1)= (169-144)/144 = 25/144  ⇒ x=25

Q 7 - Given √2 =1.414 . The value of √8 + 2 √ 32 - 3 √128 + 4 √50) is

Answer : B

Explanation

(√8+2√32-3√128+4√50)=(√4*2+2√16*2-3√64*2+4√25*2)
=(2√2+2*4√2-3*8√2+4*5√2)
=(2√2+8√2-24√2+20√2)= 6√2   = (6*1.414)=8.484

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

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 √3 = 1.732 and √2 = 1.414, then the value of 1/ (√3+√2) is

Answer : C

Explanation

1/(√3+√2)= 1/(√3+√2)*( √3-√2)/( √3-√2)= (√3-√2)/(3-2)
= (√3-√2)= (1.332-1.414)= 0.318

Q 10 - In a school teacher agree to subscribe as many rupees as there are subscribes. The Total subscription being Rs. 324 , the number of subscribers?

Answer : A

Explanation

Let the number of subscribers be x.
then, x =324 ⇒ x=√324= 18
number of subscribers =18

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