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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.
Answer : C
Explanation
Let 250/√x =10, Then √x= 250/10 25 ⇒ x= (25)2=625
Answer : D
Explanation
Given exp.= √ 0.72900/0.00841= √ 72900/841 = 270/29
Answer : C
Explanation
√0.04 = √4/100 =2/10 = 0.2
Answer : D
Explanation
√0.0016 = √16/10000 = 4/100 =0.04 ∴ x*0.04 =4 ⇒ x = 4/0.04= 4*100/4 =100
Q 7 - Given that √13 = 3.605, √130 = 11.4 ,the value of√1.3 +√1300 +√0.013 is
Answer : D
Explanation
√1.3+√1300+√0.013 = √13/10+√13*100+√13/1000 =√130/100+√13*100+√13/10000 =√130/10+10*√13+√130/100 = (11.4/10 +10* 3.605+ 11.4/100) =(1.14+36.05+0.114)=37.04
Q 8 - If (√ (x+4) +√ (x-10))/(√ (x+4)- √(x-10) =5/2 ,What is x?
Answer : C
Explanation
(√x+4+ √x-10)/(√x+4 - √x-10) = 5/2 ⇒ (√x+4+ √x-10)/(√x+4 - √x-10) *(√x+4+ √x-10)/(√x+4 +√x-10) =5/2 ⇒ . (√x+4+ √x-10)2/(√x+4 - √x-10)=5/2 ⇒x+4+x-10+2 √x+4 √ x-10/14 = 5/2 ⇒ 2x-6+2√ (x+4)(x-10)= 35 ⇒ x+√ (x+4)(x-10) = 41/2 ⇒ √ x2-6x-40= (41/2-x) ⇒ x2-6x-40 =(41-2x/2)2 ⇒ 4x2-24x-160 = (41-2x)2 = 1681+4x2-164 x ⇒ 140x = 1841 ⇒ x= 1841/140 = 263/20
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 - An army general wants to form a solid square from 36562 armies. After arrangement , he found some armies left. How many armies were left ?
Answer : C
Explanation
191 * 191 = 36481, ∴ armies left = 36562 - 36481 = 81
aptitude_squares_cubes.htm
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