Mathematical Series Questions for Competitive Exams
A rod of length 85 m is divided into two parts if the first part of the rod is 2/3 of the second part then the larger part (in metres) is.
(A) 34
(B) 170/3
(C) 85
(D) 51
Correct Answer : D
(A) 12
(B) 15
(C) 18
(D) 20
Correct Answer : A
if 3 times a number exceeds its 3/5 by 60, then the number is.
(A) 25
(B) 35
(C) 45
(D) 60
Correct Answer : A
(A) 27
(B) 29
(C) 28
(D) 30
Correct Answer : D
Simplification 
(A) 3/2
(B) 5/2
(C) 7/2
(D) 11/2
Correct Answer : C
If x2+y2+z2 = xy + yz + zx, then the value of $${3x^4+7y^4+5z^4}\over{5x^2y^2+7y^2z^2+3z^2x^2} $$ is
(A) 2
(B) 1
(C) 0
(D) -1
Correct Answer : B
Solve the following equation.
(A) 4
(B) 5
(C) 10
(D) 12
Correct Answer : C
If $$ \ {xy\over x+y}= a, $$ $${xz\over x+z}=b $$ and $$ {yz\over y+z} =c $$ where a, b, c are all non – zero numbers, then x equals to
(A) $$ 2abc\over {ab+bc-ac} $$
(B) $$ 2abc\over {ab+ac-ac} $$
(C) $$ 2abc\over {ac+bc-ab} $$
(D) $$ 2abc\over {ac+bc-ac} $$
Correct Answer : C
If $${x}^2+{y}^2x+1=0$$ then the value of $$x^{31}+y{35}$$ is
(A) – 1
(B) 0
(C) 1
(D) 2
Correct Answer : A
(A) 2√3 cm
(B) 6cm
(C) 12cm
(D) 10cm
Correct Answer : C
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Vikram Singh
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