Top 100 Quantitative Aptitude Questions and Answers

Important Aptitude Questions with Answers

$$Q.51.\ 81^{2.5}×8^{4.5}÷3^{4.8}=9^?$$

$$(A) \ 7.1 $$

$$(B) \ 9.4 $$

$$(C) \ 4.7 $$

$$(D) \ 4.5 $$

$$Q.52.\ 5\sqrt {5 }×5^3 ÷ 5^{-3/2}=5^{a+2}\ , then\ a\ is \ equal \ to  $$ 

$$(A) \ 4 $$

$$(B) \ 5 $$

$$(C) \ 6 $$

$$(D) \ 8 $$

$$Q.53.\ 2^{x-1}+2^{x+1}=2560 \ , then\ find\ the \ value \ of \ x  $$ 

$$(A) \ 10 $$

$$(B) \ 12 $$

$$(C) \ 9 $$

$$(D) \ 8 $$

$$Q.54.\ \sqrt {2^n }=64, then\ n \ is \ equal \ to  $$ 

$$(A) \ 2 $$

$$(B) \ 4 $$

$$(C) \ 6 $$

$$(D) \ 12 $$

$$Q.55.Simplify\ \left( ^3\sqrt {^6\sqrt { 2^9} \  } \ \right)^4 × \left( ^6\sqrt {^3\sqrt { 2^9} \  } \ \right)^4  $$ 

$$(A) \ 2^4 $$

$$(B) \ 2^9 $$

$$(C) \ 2^3 $$

$$(D) \ 2^{16} $$

$$Q.56.\ 17^{3.5}×17^{7.3}÷17^{4.2}=17^? $$ 

$$(A) \ 8.4 $$

$$(B) \ 8 $$

$$(C) \ 6.6 $$

$$(D) \ 6.4$$

$$ Q.57.\ If \ a = {\sqrt {3} \ \over2}, then \ the \ value \ of \ \sqrt { 1+a} \ +\sqrt {1-a} \ is   $$

$$(A) \ 2-\sqrt {3} \ $$

$$(B) \ 2+\sqrt {3} \ $$

$$(C) \ {\sqrt {3} \over2} $$

$$(D) \ \sqrt {3} \ $$

$$Q.58.\ {1\over(216)^{-2/3}}+{1\over(256)^{-2/3}}+{1\over(243)^{-1/5}} $$ 

$$(A) \ 103 $$

$$(B) \ 105$$

$$(C) \ 107 $$

$$(D) \ 109$$

$$ Q.59. \ If \ \left(\sqrt {2} \ ^\sqrt {2 } \  \right)^\sqrt {2 } \ = 2^x, then \ x \ is \ equal\ to $$

$$ (A) \ 4 $$

$$ (B)\ 2 $$

$$ (C) 1 $$

$$ (D) \sqrt {2} \ $$

$$Q.60.\ \left(  {32\over243}\right)^{-4/5} $$ 

$$(A) \ {4\over9}$$

$$(B) \ {9\over4}$$

$$(C) \ {16\over81}$$

$$(D) \ {81\over16}$$

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