Class 8 Math Solution WBBSE includes various questions and answers to help students understand key concepts for better exam preparation.
Class 8 math can be tricky, but with the right approach, it becomes easy to understand. This guide provides simple explanations and solutions for class 8 math problems based on the WBBSE syllabus. The answers are written in a way that is easy to follow, helping students to grasp the concepts more easily. With practice and understanding of the solutions, math can become a lot more enjoyable and manageable for class 8 students.
Class 8 Math Solution WBBSE
Question 1:
What is the value of pi?
Answer:
The value of pi is approximately 3.1416.
Question 2:
What is the formula for finding the area of a rectangle?
Answer:
The formula for the area of a rectangle is length × width.
Question 3:
How do you convert a fraction into a decimal?
Answer:
To convert a fraction into a decimal, divide the numerator by the denominator.
Question 4:
What is the Pythagoras theorem?
Answer:
The Pythagoras theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.
Question 5:
What is the perimeter of a square?
Answer:
The perimeter of a square is calculated as 4 × side length.
Question 6:
How do you find the area of a triangle?
Answer:
The area of a triangle is calculated by using the formula ½ × base × height.
Question 7:
What is the difference between mean, median, and mode?
Answer:
Mean is the average of numbers, median is the middle number, and mode is the number that appears most frequently.
Question 8:
What is the area of a circle?
Answer:
The area of a circle is calculated as π × radius².
Question 9:
What is the formula for finding the volume of a cuboid?
Answer:
The volume of a cuboid is calculated as length × width × height.
Question 10:
How can we simplify the expression 2x + 3x?
Answer:
The simplified expression is 5x.
Question 11:
What is the LCM of 12 and 18?
Answer:
The LCM of 12 and 18 is 36.
Question 12:
What is the HCF of 24 and 36?
Answer:
The HCF of 24 and 36 is 12.
Question 13:
How do you solve linear equations?
Answer:
To solve linear equations, isolate the variable on one side of the equation.
Question 14:
What is a rational number?
Answer:
A rational number is a number that can be written as a fraction where the numerator and denominator are integers.
Question 15:
What is the rule for multiplying two negative numbers?
Answer:
Multiplying two negative numbers gives a positive result.
Question 16:
What is the sum of angles in a triangle?
Answer:
The sum of angles in a triangle is always 180°.
Question 17:
How do you calculate the mean of a set of numbers?
Answer:
To calculate the mean, add all the numbers together and divide by the total number of values.
Question 18:
What is the difference between simple interest and compound interest?
Answer:
Simple interest is calculated only on the principal amount, while compound interest is calculated on both the principal and the interest.
Question 19:
How do you solve a quadratic equation?
Answer:
To solve a quadratic equation, use the quadratic formula: x = (-b ± √(b² - 4ac)) / 2a.
Question 20:
What is the formula for the surface area of a sphere?
Answer:
The surface area of a sphere is 4π × radius².
Question 21:
What is the formula for finding the volume of a cylinder?
Answer:
The volume of a cylinder is calculated as π × radius² × height.
Question 22:
What is the formula for the area of a trapezium?
Answer:
The area of a trapezium is calculated as ½ × (sum of parallel sides) × height.
Question 23:
What is a parallelogram?
Answer:
A parallelogram is a quadrilateral where opposite sides are parallel and equal in length.
Question 24:
How do you calculate the distance between two points on a coordinate plane?
Answer:
To calculate the distance, use the formula √((x2 - x1)² + (y2 - y1)²).
Question 25:
What is the formula for finding the area of a rhombus?
Answer:
The area of a rhombus is calculated as ½ × product of diagonals.
Question 26:
What is the definition of a composite number?
Answer:
A composite number is a number that has more than two factors.
Question 27:
What is the method to find the cube of a number?
Answer:
To find the cube of a number, multiply the number by itself three times.
Question 28:
What is the difference between a fraction and a decimal?
Answer:
A fraction represents a part of a whole, while a decimal represents a part of a whole using powers of 10.
Question 29:
How do you convert a decimal into a percentage?
Answer:
To convert a decimal into a percentage, multiply the decimal by 100.
Question 30:
What is the probability of an event?
Answer:
Probability is the measure of the likelihood of an event happening, calculated as the favorable outcomes divided by the total number of possible outcomes.
Question 31:
What is the formula for calculating the perimeter of a triangle?
Answer:
The perimeter of a triangle is calculated as the sum of the lengths of its three sides.
Question 32:
What is the volume of a cone?
Answer:
The volume of a cone is calculated as (1/3) × π × radius² × height.
Question 33:
What is the formula for the surface area of a cube?
Answer:
The surface area of a cube is calculated as 6 × side².
Question 34:
What is a prime number?
Answer:
A prime number is a number greater than 1 that has only two factors: 1 and itself.
Question 35:
What is the formula for the area of a square?
Answer:
The area of a square is calculated as side × side.
Question 36:
What is the perimeter of a rectangle?
Answer:
The perimeter of a rectangle is calculated as 2 × (length + width).
Question 37:
How do you simplify the expression 3y - 2y + 5?
Answer:
The simplified expression is y + 5.
Question 38:
What is the rule for dividing two negative numbers?
Answer:
Dividing two negative numbers gives a positive result.
Question 39:
How do you solve an inequality?
Answer:
To solve an inequality, isolate the variable on one side and apply the rules of inequalities.
Question 40:
What is a ratio?
Answer:
A ratio is a comparison of two quantities expressed as a fraction or using a colon.
Question 41:
What is the formula for calculating the area of a circle?
Answer:
The area of a circle is π × radius².
Question 42:
What is the relationship between degrees and radians in angle measurement?
Answer:
1 radian = 180/π degrees.
Question 43:
What is the formula for the perimeter of a circle?
Answer:
The perimeter (circumference) of a circle is calculated as 2π × radius.
Question 44:
How do you find the simple interest?
Answer:
The simple interest is calculated as (principal × rate × time) / 100.
Question 45:
What is the meaning of a mixed fraction?
Answer:
A mixed fraction is a whole number combined with a proper fraction.
Question 46:
How do you calculate the square of a number?
Answer:
To calculate the square of a number, multiply the number by itself.
Question 47:
What is the difference between perimeter and area?
Answer:
Perimeter is the total length around a shape, while area is the total space within the shape.
Question 48:
What is the formula for calculating the surface area of a cylinder?
Answer:
The surface area of a cylinder is calculated as 2πr(h + r), where r is the radius and h is the height.
Question 49:
What is the cube root of 27?
Answer:
The cube root of 27 is 3.
Question 50:
How do you calculate the arithmetic mean of a set of numbers?
Answer:
The arithmetic mean is the sum of all numbers divided by the total number of values.
aic recruitment 2025 brings exciting job opportunities with detailed eligibility, selection process, salary info, and step-by-step application instructions for aspirants.
aic recruitment 2025 brings exciting job openings across various posts; check eligibility, vacancies, selection process, salary, and how to apply before deadline
afcat exam date 2025 is expected to be announced soon. Know application dates, eligibility, syllabus, and how to apply for the AFCAT recruitment exam in 2025.
2025 NEET exam date has been released. Know the complete timeline, eligibility, syllabus, application process, pattern, and tips to prepare effectively for NEET 2025.
reet level 2 syllabus 2025 includes subject-wise topics, exam pattern, and latest changes for Level 2 teachers. Download PDF and start preparing now.
12th board exam time table 2025 maharashtra science is now available. Check key dates, subjects, eligibility, syllabus, and preparation tips for the HSC Science exam.
railway group d vacancy 2025 syllabus includes subjects, topics, and exam pattern details. Get complete info to start your preparation the right way.
10th public exam time table 2025 is officially released. Get full details on exam dates, eligibility, syllabus, pattern, preparation tips, and how to apply.
10th CBSE exam date 2025 has been released. Check complete exam schedule, syllabus, eligibility, how to apply, and preparation tips for CBSE Class 10 exam.
physics class 12 syllabus 2025 includes updated topics, unit-wise chapters, practicals, and CBSE marking scheme to help students prepare efficiently.
10 th exam date 2025 is expected in March. Check complete schedule, eligibility, exam pattern, syllabus, application process, and preparation tips for success.
jee main 2025 exam dates announced by NTA: check application start, last date, exam schedule, admit card release, result dates, and complete eligibility criteria.
cbse board exams 2025 are approaching—check key dates, syllabus changes, exam guidelines, and preparation tips for Class 10 and 12 students here.
jee mains chemistry syllabus 2025 includes physical, organic, and inorganic topics from Class 11 and 12, aligned with the latest NTA exam pattern and weightage.
nift syllabus 2025 includes subject-wise topics, updated exam pattern, marking scheme, and preparation tips for B.Des, M.Des, B.FTech, and M.FTech programs.