Level 6 facts to memorise


Level 6 Facts


What is a denominator?The bottom number in a fraction.
What is a numerator?The top number in a fraction.
When do you need a common denominatorWhen adding or subtracting fractions.
What is 10% as a fraction?1/10
What is 20% as a decimal?0.2
What is 1/4 as a percentage?0.25
What is 2/5 as a decimal0.4
What is 75% as a fraction?3/4
What is 9/10 as a percentage?90%
How do you convert a fraction to a percentage?Fraction x 100
How do you convert a decimal to percentageDecimal x 100
What is the formula for percentage change?(Amount of change/Original amount) x 100
When a negative number is multiplied by a negative number is the answer negative or positive?positive
eg (-2) x (-3) = 6
When a positive number is multiplied by a negative number, is the answer negative or positive?Negative
eg (-3) x 4 = (-12)
How do you find HCF of two numbers using the products of the prime factors?Use the lowest version of only the common prime factors.
How do you find the LCM of two numbers using the products of their prime factors?Use the highest version of all the prime factors.
What does LCM stand for?Lowest Common Multiple
What does HCF stand for?Highest Common factor
What is the resiprocal of a fraction?The fraction upside down.
What kind of a line is y = numberStraight, horizontal
What kind of a line is x = numberStraight, vertical.
what letter is used to stand for gradient?m
What does 'gradient' mean?The steepness of a line.
What is the formula for gradient?(difference in y)/(difference in x)
(y1 - y2)/(x1 - x2)
What does 'intercept' mean?The point where a straight line cuts the y axis.
What letter is used to stand for intercept?c
In y = mx + c, what does the 'm' stand for?m = gradient
In y = mx + c, what does the 'c' stand for?c = intercept with y axis
What is the general equation of a straight line?y = mx + c
How do you calculate the coordintates of the mid point of a line between the points (x1,y1) and (x2,y2)?(x1 + x2)/2
(y1 + y2)/2
What does the graph of a positive quadratic look like ?'Smiley face'
What does the graph of a negative quadratic look like?'Sad face'
If lines are parallel, what is the connection between their gradients?they are equal
m1 = m2
How do you solve simultaneous equations using graphs?Draw both lines,
the solution is the coordinate of the point where the line cross.
What is the name of a 4 sided shape?Quadrilateral
What is a rhombus?A parallelogram with 4 equal sides.
What is a parallelogram?A 'squashed' rectangle
What is the name of a quadrilateral with only one pair of parallel lines?Trapezium
What do the interior angles of a quadrilateral add up to?360 degrees
What are 'alternate angles'?Z angles on parallel lines.
Alternate angles are equal.
What are corresponding angles?F angles on parallel lines.
Corresponding angles are equal.
What are 'interior angles'?C angles in parallel lines.
Interior angles add up to 180 degrees.
What is a radius?Distance from centre to edge of circle.
What is a diameter?The distance from edge to edge of a circle that passes through the centre.
Diameter = radius x 2
What is the formula for the Area of a circle?A = ∏r2
What is the formula for the circumference of a circle?C = ∏d
What does 'circumference' mean?The perimeter of a circle
What is the formula for the area of a cuboid?V = length x width x height
What is the formula for the volume of a cube?V = length3
What do the exterior angles of any polygon always add up to?360°
What do the interior angles of a pentagon add up to?540°
What is the formula for the sum of interior angles of any polygon?Si = 180(n - 2)
What is an angle of elevation?Upwards from horizontal.
What is an angle of depression?Downwards from horizontal.
How many cm3 is 1 m31 m3 = 1,000,000
How many mm3 = 1 cm31 cm3 = 1,000 mm3
What is the formula for the area of a parallelogram?A = base x height
What facts are needed to prove 2 triangles are congruent?SSS, SAS, ASA, AAS, RHS
What are 'similar shapes'?2 shapes, identical in every respect except size.
How is the probability of one event calculated?P(event)
= (no of times event occurs)/(total number of events)
What is the probability of an event NOT happenning?P(event not happenning)
= P(event')
= 1 - P(event)
In a scatter diagram, what is negative correlation?\
ie down from left to right
In a scatter diagram, what is positive correlation?/
ie up from left to right.
What is perfect correlation?All dots lie in a straight line.
What is 'strong' correlation?The dots are very close to being in a straight line.