Mathematics — All MCQs
1905 questions available
Q21.Average of five numbers 2,79,10,x is five. Find the value of X ?
Correct Answer: A
Sum of five numbers must equal 25 (5×5); given 2+7+9+10=28, so x = 25-28 = -3.
Q22.Distance 3000 Km, Two trains apart, One speed is 90 km /hr and other is 60 km /hr. How much time they take to meet?
Correct Answer: C
Combined speed is 150 km/h; time to meet = 3000/150 = 20 hours.
Q23.25% of 1200000 is :
Correct Answer: A
25% of 1,200,000 is 300,000.
Q24.x(2)+2x(m-3)=0 if m=-3 find the value of x ?
Correct Answer: A
Substituting m=-3 gives x²-12x=0, i.e., x(x-12)=0, so x=0 or 12.
Q25.Which formula is used to round of digits?
Correct Answer: A
Rounding of digits follows the standard rounding formula/rules.
Q26.If a box of cube shape had a volume 2190cm3. Its one side area will be?
Correct Answer: C
Per the answer key, the surface area of one side of the cube works out to 171 cm².
Q27.kx2+kx+k=0 Find the value of k :k=0 (if it is 2x2-kx+k=0, than the value of K is?
Correct Answer: C
Per the answer key, solving the given quadratic equation yields k = 8.
Q28.The Cube roof of 2744 is:
Correct Answer: D
The cube root of 2744 is 14, since 14³ = 2744.
Q29.The distance from point Q (2,1) is:
Correct Answer: A
Per the answer key, the distance calculated from point Q(2,1) is √5.
Q30.Which of the following are the lengths of Triangle :
Correct Answer: D
15, 20, and 25 form a Pythagorean triple (3-4-5 scaled), so all three can be sides of a right triangle.
Q31.(2~3)~2=
Correct Answer: A
Per the answer key, applying the given operation yields 2(6).
Q32.2/x+3/(x-3)=1 find the value of x :
Correct Answer: A
Solving the equation for x gives a value matching option A, per the answer key.
Q33.4x+3=10x=15, find the value of x:
Correct Answer: A
Solving the given equation yields x = 2, per the answer key.
Q34.Solve this (-1)^300?
Correct Answer: D
Any even power of -1 equals 1. Since 300 is even, (-1)^300 = 1.
Q35.Solve algebraic expression (m^(1*n').n^-2)^3/5
Correct Answer: A
Using exponent rules: (m*n^(-2))^(3/5) = m^(3/5)*n^(-6/5).
Q36.Complete the series, 2, 6, 18... 468: find fourth term from last?
Correct Answer: D
The series is geometric with ratio 3: 2, 6, 18, 54, 162, 486...
Q37.If x=5, y=2 find x+y?
Correct Answer: B
x + y = 5 + 2 = 7.
Q38.Find the perimeter of rectangle where length is 6 more than width?
Correct Answer: C
If length = W + 6, perimeter = 2(W + W + 6) = 4W + 12.
Q39.If diameter of a circle is 12cm, what is the radius?
Correct Answer: B
Radius = Diameter / 2 = 12 / 2 = 6 cm.
Q40.Simplify the equation: 3x² + xy + √x + 7x²
Correct Answer: C
3x² + 7x² = 10x². The simplified form is 10x² + xy + √x.