The Math You Need to Know

General knowledge questions/answers about common and general mathematics for competitive examinations.

1.What is ,the value of “π (pi)” rounded to two decimal places?
Ans. “3.14”..
2.How many degrees, are there in a right angle,?
Ans. “90 degrees”..
3.What is, the value of the square root, of 144,?
Ans. “12”..
4.In a triangle; what is the sum ,of the interior angles,?
Ans. “180 degrees”..
5.What is, the area of a rectangle, with length 5 units, and width 10 units,?
Ans. “50 square units”..
6.How many sides, does a hexagon have,?
Ans. “6 sides”.
7.What is, the value of 8 factorials (8!)?
Ans. “40320’..
8.What is ,the term for a number, that can only be divided evenly, by 1 ,and itself?
Ans. “Prime number”..
9.What is, the formula, to find the circumference of a circle?
Ans. “Circumference = 2πr (where r is the radius)”..
10.What is, the value, of 5 squared (5^2)?
Ans.25
11.How many millimetres, are there in a centimetre?
Ans. “10 millimetres”..
12.What is, the value of the cube root of 27?
Ans. “3”..
13.What is ,the sum of the angles, in a quadrilateral?
Ans. “360 degrees”..
14.What is, the formula, to find the volume of a cube?
Ans. “Volume = side length^3”..
15.How many sides, does a pentagon have?
Ans. “5 sides”..
16.What is the value of 3 to the power of 4 (3^4)?
Ans.81
17.How many degrees are there in a full circle?
Ans.360 degrees
18.What is the formula to find the perimeter of a rectangle?
Ans. Perimeter = 2(length + width)
19.What is the value of the square root of 100?
Ans.10
20.How many centimetres are there in a meter?
Ans.100 centimetres
21.What is the value of the golden ratio, often denoted by the Greek letter φ (phi), rounded to two decimal places?
Ans. Approximately 1.62
22.How many faces, edges, and vertices does a cube have?
Ans. A cube has 6 faces, 12 edges, and 8 vertices.
23.What is the formula to find the area of a circle?
Ans. Area = πr^2 (where r is the radius)
24.What is the value of the natural logarithm of e (ln(e))?
Answer: 1
25.How many radians are there in a full circle?
Ans.2π radians
26.What is the value of the square root of 2, rounded to two decimal places?
Ans. Approximately 1.41
27.What is the formula to find the surface area of a sphere?
Ans. Surface Area = 4πr^2 (where r is the radius)

28. What is the sum of the interior angles of a regular polygon with n sides?
    Ans. (n-2) * 180 degrees
29. What is the value of the cube root of 64?
    Ans. 4
30. What is the formula to find the volume of a cylinder?
    Ans. Volume = πr^2h (where r is the radius and h is the height)
31. What is the value of 10 factorials (10!)?
    Ans.3628800
32. How many diagonals does a hexagon have?
    Ans. 9 diagonals
33. What is the formula to find the area of a triangle given the lengths of its three sides (a, b, and c)?
    Ans. Area = √(s(s-a) (s-b) (s-c)), where s is the semi-perimeter (s = (a + b + c) / 2)
34. What is the value of the square root of 3, rounded to two decimal places?
    Ans. Approximately 1.73
35. How many degrees are there in a straight angle?
    Ans. 180 degrees
36. What is the value of 2 to the power of 10 (2^10)?
    Ans. 1024
37. How many sides does a decagon have?
    Ans. 10 sides
38. What is the formula to find the volume of a cone?
    Ans. Volume = (1/3) πr^2h (where r is the radius of the base and h is the height)
39. What is the value of the cube root of 125?
    Ans.5
    Mathematics is a field of study that discovers and organizes methods, theories and theorems that are developed and proved for the needs of empirical
40. What is the formula to find the perimeter of a circle?
    Ans. “Perimeter = 2πr (where r is the radius)”
41. What is, the value, of the imaginary unit, denoted by ‘i’?
    Ans. “√ (-1)”
42. How many sides, does a regular heptagon have,?
    Ans. “7 sides”
43. What is, the formula, to find the area of a trapezoid,?
    Ans. “Area = (1/2) * (sum of parallel sides) * height”
44. What is ,the value of the Euler’s number, often denoted by ‘e’, rounded to two decimal places,?
    Ans. “Approximately 2.72”
45. How many degrees, are there in a right-circular cone,?
    Ans. “360 degrees”
46. What is, the value, of the natural logarithm of 10 (ln(10)), rounded to two decimal places,?
    Ans. “Approximately 2.30”
47. What is ,the formula, to find the volume ,of a rectangular prism,?
    Ans. “Volume = length * width * height”
    48.How many faces, edges, and vertices does a dodecahedron have,?
    Ans. “A dodecahedron has 12 faces, 30 edges, and 20 vertices.”
48. What is, the value, of 4 factorials (4!),?
    Ans. “24”
    50.How many radians, are there in a straight angle,?
    Ans. “π radians”
49. What is, the formula, to find the area of a parallelogram,?
    Ans. “Area = base * height”
    52.What is, the value, of the square root of 5, rounded to two decimal places,?
    Ans. “Approximately 2.24”
    53.How many degrees ,are there in a full turn,?
    Ans. “360 degrees”
50. What is, the formula, to find the volume of a pyramid,?
    Ans. “Volume = (1/3) * base area * height”

• What is, the value ,of 7 squared (7^2),?
Ans. “49”

• How many millimetres, are there in a meter?
Ans. “1000 millimetres”

• What is, the formula, to find the circumference of a semicircle,?
Ans. “Circumference = πr + 2r (where r is the radius)”

• What is, the value ,of the cube root of 216,?
Ans. “6”

• How many diagonals, does an octagon have,?
Ans. “20 diagonals”

• What is, the formula, to find the perimeter of a square,?
Ans. “Perimeter = 4 * side length”

Mathematics is a field of study that discovers and organizes methods, theories and theorems that are developed and proved for the needs of empirical

• What is, the formula, to find the area, of a sector of a circle,?
Ans. “Area = (θ/360) * πr^2 (where θ is the central angle in degrees and r is the radius)”

• How many sides ,does a regular nonagon have,?
Ans. “9 sides”

• What is, the formula ,to find the volume, of a sphere,?
Ans. “Volume = (4/3) * πr^3 (where r is the radius)”

• How many edges, does a tetrahedron have,?
Ans. “6 edges”

• What is, the formula, to find the area, of a regular polygon with apothem (a) and perimeter (P),?
Ans. “Area = (1/2) * a * P”

• How many degrees ,are there in an acute angle,?
Ans. “Less than 90 degrees”

• What is, the formula to find the volume of a rectangular pyramid,?
Ans. “Volume = (1/3) * base area * height”

• How many edges, does an icosahedron have,?
Ans. “30 edges”

• What is, the to find the area of a rhombus with diagonals d1 and d2,?
Ans. “Area = (1/2) * d1 * d2”

• How many degrees, are there in an obtuse angle,?
Ans. “More than 90 degrees but less than 180 degrees”

• What is, the formula ,to find the volume of a rectangular prism,?
Answer: “Volume = length * width * height”

• How many vertices, does a cube have,?
Ans. “8 vertices”

• What is, the formula, to find the area of a regular hexagon with side length s,?
Ans. “Area = (3√3 / 2) * s^2”

• How many edges ,does a dodecahedron have,?
Ans. “30 edges”

• What is ,the formula, to find the volume of a cylinder,?
Ans. “Volume = πr^2h (where r is the radius and h is the height)”

• How many degrees, are there in a straight angle,?
Ans. “180 degrees”

• What is, the formula, to find the area of a kite with diagonals d1 and d2,?
Ans. “Area = (1/2) * d1 * d2”

• How many faces, does a cuboid have,?
Ans. “6 faces”

• What is, the formula, to find the volume of a cone,?
Ans. “Volume = (1/3) * πr^2h (where r is the radius of the base and h is the height)”

• How many edges ,does a pentagonal prism have,?
Ans. “15 edges”