Maths Flashcards
Maths revision (21 cards)
What is a ratio
A ratio shows the relationship between two quantities
What are indices
The amount of times it has been timed by it self for eg. 2 to the power of 4 = 1x2x2x2x2 = 16
How do you calculate the percentage of an amount
number / total number × 100
How do you calculate the reverse of a percentage
taking the percentage we have been given, dividing to find 1% and then multiplying by 100 to find 100% .
What are the three types of numbers?
Rational integers and irrational
What does integers mean?
Whole numbers, e.g. positive/negative or zero
What does rational mean?
A number that can be expressed (written) as a fraction
What does irrational mean?
Anything else (eg TT or surds)
What is HCF and what does it stand for?
Highest common factor - largest whole number which is shared by other given numbers .For example, common factors of 10 and 20 are 1, 2, 5 and 10, but the highest of those is 10; therefore, the highest common factor of 10 and 20 is 10.
What is LCM and what does it stand for?
Lowest common multiple - The lowest common multiple is the lowest multiple shared by two or more numbers. For example, common multiples of 4 and 6 are 12, 24 and 36, but the lowest of those is 12; therefore, the lowest common multiple of 4 and 6 is 12.
What is product of prime?
take any positive number and write it as a series of prime numbers being multiplied. E.g. Factor tree.
What is direct proportion?
As one value increases, so does the other. on a graph
What is perimeter?
Perimeter is a math concept that measures the total length around the outside of a shape.
What is the volume of a prism?
Volume = base x height
What is the surface area of a prism?
the total area of all of the faces
What is a similar shape?
Same shape, different size
What are angles in parallel lines?
angles that are created when two parallel lines are intersected by another line called a transversal
What are angles in polygons?
relate to the interior and exterior angles of regular and irregular polygons
What is construction in maths?
accurate drawings of shapes, angles and lines in geometry
What is Pythagoras theorem?
A squared + B squared = C squared
How do you work out ;
Speed
Distance
Time
Speed = distance divided by time
Distance = speed x time
Time = distance divided by speed
