7 MATH MCQ

Q1. Name the cross section when a cone is cut vertically. Circle Square Rectangle Triangle Solution Triangle Q2. Which of the following is an example of 3D object? Circle Triangle Rectangle Cube Solution Cube is a 3D object Q3. If three cubes of dimensions 3 cm by 3 cm by 3 cm are placed side by side, what would the dimensions of the resulting cuboid be? ...

Q1. An object looks exactly similar to the original object if it is rotated by some angle. This type of symmetry is called ______ symmetry. line Rotational Angle Mirror Solution Rotational Q2. Which of the following figure has only one line of symmetry? Circle Square Equilateral Triangle Isosceles Trapezium Solution Isosceles trapezium has only one line of symmetry. Q3. A line which divides a figure into two identical parts is known as ________ of symmetry. ...

Q1. If the expanded form of a number is 2 × 10 4 + 3 × 10 2 + 5 × 10 1 + 7, then the number is 23057 23570 20357 25307 Solution 2 × 10 4 + 3 × 10 2 + 5 × 10 1 + 7= 2 × 10000 + 3 × 100 + 5 × 10 + 7 = 20000 + 300 + 50 + 7 = 20357 Q2. 3 6 = 3x3x3x3 6x6x6 3x3x3x3x3x3 3x3x3x3x3 Solution 3 6 = 6 times 3 i.e. 3x3x3x3x3x3 Q3. 6561 in exponent notation is : ...

Q1. Addition of -4x and 6x is -2x 2x -24x 5x Solution -4x + 6x = 2x Q2. For what value of x, the given algebraic expression 8x 3 - 7x 2 + 12x - 13 becomes 0 -1 1 2 -2 Solution Trying all the given options, (A) At x = -1, we have 8 x (-1) 3 – 7 x (-1) 2 + 12 x (-1) - 13 = -8 - 7 - 12 - 13 = -40 (B) At x = 1, we have 8 x (1) 3 – 7 x (1) 2 + 12 x (1) - 13 = 8 - 7 + 12 - 13 = 0 (C) At x = 2, we have 8 x (2) 3 – 7 x (2) 2 + 12 x (2) - 13 = 64 - 28 + 24 - 13 = 47 (D)...

Q1. Area of a circle whose radius is 8 m is 215.96 m 2 300.26 m 2 210.46 m 2 200.96 m 2 Solution Area of circle = = 3.14 x 8 x 8 = 200.96 m 2 Q2. The base of a parallelogram is 5 inches and its height is twice its base. Find the area of parallelogram. 60 square inches 30 square inches 50 square inches 40 square inches Solution Base = 5 inches Thus, height = 2 x 5 = 10 inches Hence, area of parallelogram = base x height = 5 x 10 = 50 square inches Q3. The a...