# Do Not Enter The Exams Hall Without Knowing These 25 Simple Maths Formulas

Do Not Enter The Exams Hall Without Knowing These Simple Maths Formulas. Some topics in Mathematics are all about formulas. Knowledge of these topics gives a candidate an upper hand. With such questions, all that a candidate has to do is to identify the separate variables and substitute them in the formula. Thus, it is very necessary for candidates to be abreast with if not all, majority of the maths formulas.

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Hence, this article provides candidates with all the key concepts that have formulas. The tasks of candidates, therefore, is to search for these formulas, chew them, and know how to apply them.

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## Check out the maths formulas for the following concept

- Number of subsets
- The perimeter of a rectangle, square, parallelogram, trapezium, kite, rhombus, triangle, and sector of a circle
- Area of a rectangle, square, parallelogram, trapezium, kite, rhombus, triangle, sector of a circle, and circle
- Difference between two squares
- Percentage change (Percentage increase and percentage decrease)
- Cost price, Selling price, Profit, Loss, Profit percent, Loss percent
- New price after discount, original price before discount, discount allowed, amount saved after discount
- New value after depreciation, original value before depreciation, depreciated value
- Commission
- Simple Interest, Amount
- Gradient, the equation of a line given the gradient and a point on the line, the equation of a line given two points on the line
- Average speed, distance covered, time taken
- Distance on the ground, distance on a map, scale
- The rule of a mapping
- The surface area and volume of a prism
- Curved surface area, total surface area, and volume of an opened and closed cylinder
- Total surface area and volume of a cube, cone, and cuboid. The curved surface area of a cone
- Surface area and volume of a sphere and hemisphere
- Magnitude and direction of a vector
- Probability
- Mean, mode, median, range
- Reflection in the x-axis, reflection in the y-axis, rotation 90, 180, 270 degrees clockwise, translation and enlargement
- Scale factor
- Sum of interior angles, interior angle, the exterior angle
- Pythagoras theorem

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